Hate to break it to you but we already have a battery powered paint sprayer.
https://www.homedepot.com/pep/Graco-Handheld-TC-Pro-Cordless-Airless-Sprayer-17N166/301100278
Vevor 5-6inch orbit sander 350W - Pass
Not a big woodworker but built a cabinet and needed to prep it for paint. Didn't want to spend the money for a Mirka/Festool sander and when a basic dewalt palm sander is like $100, thought why not try the Vevor unit at $130. No complaints for the one...
Didn't say if you needed MM or SAE but Gearwrench and Harbor Freight have responably priced sets.
https://www.gearwrench.com/all-tools/tool-sets/mechanics-tool-sets/gwx6pt25-25-piece-38-drive-pass-thrutm-ratchet-and-socket-set...
Foam is too much work to cut out and if you need to reorganize to accommodate a new tool you better have planned ahead or get to redo everything on a new sheet of foam.
Most efficient use of space has to be toolgrid in my opinion, plus you have the flexibility to change the layout down the road...
Put lapping compound on the chuck taper, then insert and remove a couple dozen times. Then thoroughly clean compound from the chuck and spindle, double check you cleaned it good.
This should knock down the high spots in your taper so you get even and continuous contact.
Anyone heard if Milawukee is planning to come out with a newer version of the M12 Installation Driver?
Not a fan of the FWD/REV electric top button design, wish it had the standard plastic side to side toggle like every other drill/driver has.