When someone mentions just an A5, I'm assuming they're talking about the A5 LUX. The A5 LUX has been known for its excessive rattling - things like tape and rubber tubing need to be shoved into some of its orifices to quiet it down.

You have the much quieter A5 DLX. It's most likely that you won't be needing any modding for awhile, at least until the wheels start wearing down or making noise. Also, the hand grips and grip tape will begin to go through its wear and tear.

For now, for less twitching in the steering, you could get some 'inside locking' bicycle grips. With the ability to tighten the grips on the inside, if you feel safe enough, you can cheat a little and pull the grips outward a little to give a few inches of width to the handlebars.

I recommended the A5 DLX as a good base for adult kick scooters in another thread. Enjoy!