BearExxa Mosquito (BEM) body modified for PTFE tube

While using the original model for a few hours of printing, I noticed that the PTFE tube slowly moves upwards because of the retractions and inevitably gets caught by the extruder wheels. The tube is afterwards damaged in such a way that the filament path is blocked and the print is ruined. To prevent this, I have inserted a stepped hole, which prevents the PTFE tube from sliding upwards. 

I have oriented myself strongly to the original Prusa design. Caution: I printed the part using the SLS process and therefore omitted the drop-shaped hole. For printing by FDM/FFF, support geometry is therefore needed in the central hole. This can be easily removed afterwards with a 4mm drill bit. The PTFE tube must be cut to a new length of 32mm. It is recommended to use the original PTFE tube from Prusa and shorten it to 32mm. Make sure that the side with the chamfer of the tubes inner diameter remains and that this side is mounted towards the top (in the direction of the extruder wheels).