Robo r1+ coverless Z stabilizer

I liked having the cover off my robo r1+ for changing the filament and doing maintenance, but I missed having the sides for my tool holder and front/back z stabilization. I reworked BLKFLD's stabilizer to sit a little higher on the lead screws, added a built in filament guide and wiring hook, and angled the clearance so I could get a full 200 mm of z height after cutting off the middle of the original cover.