SummaryHello! New upgrades! Easier prints! Here's the ver1.0 Ultimaker Clone with RAMPS 1.4 http://www.thingiverse.com/thing:1178406 1) 3mm filament geared extruder block - Can retrofit original extruder. Note: Marlin firmware (Configuration.h) 'step/mm' for extruder needs to be multiplied with the increased gear ratio. e.g. 16T and 36T would be 2.25:1, hence add *2.25 Or you can use this too: https://www.youmagine.com/designs/belt-geared-um2-feeder-upgrade Bill of Material: 2 x MF105zz Flanged Ball Bearings (5mmX10mmX4mm) 1 x 5mm diameter, 50mm length, stainless steel dowel pins 1 x 55 teeth, 110mm, 6mm width, GT2 timing belt 1 x 16T, 5mm bore, drive pulley 1 x 36T, 5mm bore, drive pulley 1 X MK8 Extruder Drive Gear, 5mm bore (this seems to perform better than the original Knurled gear) Filament feeder from: https://www.youmagine.com/designs/alternative-um2-feeder-version-two Vital Bill of Material: 1 x U604ZZ Bearing U-Groove 4X13X4mm 2) XY slider block is now even easier to print and assemble, just print 2 x symmetrical part. 3) Fan duct reducer, convert 40mm fan to cheaper more widely available 30mm fan