I believe mycotopia has vendor reviews. Are you in the US or somewhere else? If you dm me I know a handful of good vendors for US, but they have been for mhrb (assuming from service and quality they would do you good for acrb).

Vm&p naptha has worked for me with no issues and residue you’ve heard about could be caused by a variety of reasons and can usually be fixed with a re-x in clean naptha or heptane.

I use ComStar 024924305003 Pure Lye Bead Drain Opener, 1 lb, White https://www.amazon.com/dp/B00PKNBK24/ref=cm_sw_r_cp_api_i_bA5.DbP2X71QD It’s a little cheaper and when it comes to lye I wouldn’t worry about “food grade” it’s just there to bring the pH up and if you do the extraction right it won’t end up in your final product. Lye is dangerous so “food grade” lye is almost laughable imo. If you’re worried about harsh ingredients there are other teks although I highly recommend using lye, but be very careful and have vinegar nearby to neutralize any spills. Always add lye to water not the other way around. Add it in increments as it produces a lot of heat with will break glassware and cause a mess. I suggest gloves, goggles, and something to cover your mouth like surgical mask or something similar while extracting due to the nature of the process.