Prusa Maintenance Stand - low material use

I printed the excellent [Prusa Maintenance Stand](https://www.thingiverse.com/thing:2249396/) and it was great, but i used quite a bit of filament and took a long time to print. By changing the design I was able to reduce the filament use from 115g to 61g and the print time at 0,3mm from 5:12 to 2:40 hours while retaining more than adequate strength.