p802m frame stiffners lower

Update Oct.11 2016 Trimmed these a bit more to avoid having to use snipes on them as I did. Left the originals as ver 2 is not tested yet

just notched out the bottom left side to go around the end stop mount. for the top stiffeners or if you don't have the end stop located there please see original here http://www.thingiverse.com/thing:1478388