How are hurting your fingers? Are you crimping them manually? If you don't have a basic crimping tool or a ratcheting crimping tool, I'd suggest one of those or both. Depending on if you're working with .110 or .187 connectors you might need a specific size of the tool.

I picked up these uxcell 2.8mm and 4.8mm quick disconnects and had no trouble crimping them with the proper tools.

Link to crimpers https://www.amazon.com/IWISS-Professional-Compression-Ratcheting-Wire-electrode/dp/B00OMM4YUY/ref=sr_1_3?ie=UTF8&qid=1546996745&sr=8-3&keywords=iwiss+crimping+tool

You should have gone with a MKS 1.4 or MKS Gen L board. The MKS boards are integrated boards with the mega and ramps on the same board.

Although the setup you bought will work fine, a couple of resources to get you started:

• https://3dprinterwiki.info/uncategorized/melzie-to-ramps-conversion/
• https://hackaday.io/project/100272-converting-a-monoprice-maker-select-v2-to-ramps (in this one they used the MKS board but because it is just a board that has ramps integrated there will still be relevant info)
• https://www.youtube.com/watch?v=LgQ9aHW8SOo

If you do any google searches you might be better off searching "maker select melzi to ramps" since the monoprice maker select wanhaoi3 clone is pretty widespread.

If you do end up needing to create dupont connectors get yourself some crimpers, you will save yourself a lot of grief vs trying to do it with needle nose pliers:

https://www.amazon.com/IWISS-Professional-Compression-Ratcheting-Wire-electrode/dp/B00OMM4YUY/ref=sxts_kp?keywords=dupont+crimper&pd_rd_i=B00OMM4YUY&pd_rd_r=433f378a-ee5c-44cc-8cb7-6430d1bf4ba4&pd_rd_w=KXjCw&pd_rd_wg=e6d7q&pf_rd_p=9e1f8218-b1c6-41ee-b8db-ab27d6c0f6de&pf_rd_r=26HT57E8PVYAWKPRTZTP&qid=1551714754&s=gateway

And you will need a kit with the dupont connectors in them:

https://www.amazon.com/Dupont-Connector-Kit-Connectors-Plusivo/dp/B078RRPRQZ/ref=pd_bxgy_469_img_2/134-6731227-6965263?_encoding=UTF8&pd_rd_i=B078RRPRQZ&pd_rd_r=8d1da4ef-3e95-11e9-9741-2bc3fc200bcc&pd_rd_w=1MQuC&pd_rd_wg=51k2t&pf_rd_p=6725dbd6-9917-451d-beba-16af7874e407&pf_rd_r=ZVC4CWHVXWP5FZPSGMP8&psc=1&refRID=ZVC4CWHVXWP5FZPSGMP8

When I switched to a MKS Gen 1.4 board I only had to convert my extruder motor to a dupont connector. Everything else was just plugged right in. I am unsure if this is true when using an actualy RAMPS 1.4 board.

I don't know where you're located, but I bought this one

But sweet God I can't imagine doing it without a tool.

Get these and never have an issue!

https://smile.amazon.com/gp/product/B00OMM4YUY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

https://smile.amazon.com/gp/product/B01MCZE2HM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I use this: https://www.amazon.com/IWISS-Professional-Compression-Ratcheting-Wire-electrode/dp/B00OMM4YUY/

It's identical to the MDPCX crimper. MDPCX milled out the middle jaws a slight bit, but the original works just fine. The one you are looking at is the same I believe.

I use the pin remover from mainframe, it works really well and has replicable pins.

https://mainframecustom.com/shop/cable-sleeving/mainframe-customs-terminal-extractor/

For wire strippers, I use this: https://www.amazon.com/VCELINK-Automatic-Stripper-Professional-Adjustable/dp/B08G48R47N

For snips I use https://www.amazon.com/Hakko-CHP-170-Micro-Cutter/dp/B00FZPDG1K/

I think you would be happier with these tools and it's probably cheaper. But the kit you are looking at looks good too for $60. And it's a cool blue color lol

EDIT: Actually, I think that kit has this one: https://www.amazon.com/MUYI-Waterproof-Connector-Ratcheting-0-14-1-5mm%C2%B2/dp/B01N5KYWDF/ which is different than the IWISS and MDPCX crimper.

I tried this one before using the IWISS and it wasn't very good, the tolerances were off and the crimps came out terrible.

Not sure about the one you listed, but this is what I use and it works perfectly.

This is the crimping tool I'm using. It seems ok, and had good reviews on Amazon. I will say that I'm having a hard time with the "pre-crimp," in that if I go all the way to 3 clicks, it's too far, so I'm having to stop at 2 clicks. Not sure that's causing an issue, though. I'm using 18 ga wire.

Based on some of the other comments, I'm pretty sure I was carrying the sleeving up too far, and that was making it hard to get the pin in the hole. I've back the sleeving up/trimmed some of it down, and it's going a little better.

Thanks for the response!