M4 Hinged Extruder, Reinforced Guidler

Hinged Wade-Extruder block for M4 idler bolts, with a handle on the idler and a few fixes. Now updated, see below :)
When I first printed Greg's Hinged Accessible extruder, I had to hack out the top captive nut holes that idler bolts went through since they were under-sized in one direction, then ended up accidentally over-sizing the holes with my multitool's chisel, so I used M4 nuts and bolts instead. (I wasn't even sure at the time if it was meant to be M3 or M4 fitting since the bolt holes