LampSocket for model Helferlein 13 - Little Helper / little bulb

Motivation

I found this very nice model of "Helferlein / Little Helper" by DIY Wizard
(based on the popular model "Dummy 13").

When I tried to print the model, the lamp socket available only resulted in minor quality parts when printed with PETG (as recommended).

I designed a new lamp socket that also integrates the following Mini LED Light for this model scaled to 150%.

https://www.printables.com/model/1613864-lampsocket-with-mechanically-switchable-led-light
As this design uses the Mini LED Light as structural part, the use of a lamp is mandatory.
The parts do not function without the LED lamp.

As small spin-off, I also created a solid PETG-printable lamp socket without light,
which not only can be used for the model scaled to 150%, but should also works 
for the smaller scaled 100% model (original size).

For this I decided to adapt the design of the pluggable, completely new lamp socket to:
  a) get an Easy-to-Print version of the lamp socket for holding the bulb (head)
  b) get stable joint parts printable in PETG with satisfying quality that can simply be plugged together

Solution

The new part of the lamp socket:
   a) can be easily printed with PETG
   b) can be used for different scales of the model
   c) has an opening to snap in the part "Body2_(1).stl" provided with the model
   d) provides a matching thread for the transparent bulb

Printing

   material:                 PETG (optionally PLA for non-joint-parts is also possible)
   layer height:           0.15mm
   support:                  not required
   brim:                       not required
   print orientation:   bottom face facing downwards
   print sheet:            satin metal sheet (or equally suitable)
   colour:                    Grey


[Hint]
Print the bulb in vase mode to get a nice transparent bulb.
(I only tested the model assembly with this print variant. I used transparent PETG for my prints.)