About this 3D model

i modeficated this lens adapter (from Andrew Barton : http://www.thingiverse.com/thing:19936) to fit a old cd-rom or dvd-rom drive laser lens.into it. for that cheap setup, it works well! if you whant to print this, you need to print the first layers very slow, i printed it with 20mm/s for the first 10% of layers, after that i speeded it up to 40mm/s, so i was able to keep the rounder design. my printer settings: printer: prusa i2 filament: pla / 3mm speed: 20 - 40 mm/s layerhigh: 0.2 mm hotend: merlin nozzle: 0.5 maybe with smaller nozzle, it would be more easy and finer, but i was to lazy to change the nozzle for just the one print,