I have made two changes to the original design by Tech2C in order to make it easier to fit the handle cover. The changes simply reduce the thickness of the Trigger and Firing Lever from 5mm to 4.2mm. I also wanted to reduce the thickness of the circular steps which sit at the bottom of the locating pins in the handle - my CAD program indicates that they are 0.5mm tall which works out to be two and a half layers when using a layer height of 0.2mm - impossible to print accurately with this setting. However, without the original source files, I was unable to do this. There are four files here, one is a complete plate of parts, (apart from the arrow), which is about 135mm x 100mm, the second is a plate of my two changed parts which are also uploaded separately. Thank you Tech2C, hope you don't mind me making the above changes to a very elegant design.Print the plate for a complete set of parts. If you have already printed the parts uploaded by Tech2C, print out the new parts either singly or using the STL which carries them both. I used similar print settings to Tech2C, that is, 0.2mm layer height and 30% infill. Sliced using Skeinforge.