E18 toy pistol - improvements

I've made some adjustments for easier printing.
I did not change sizes so parts should be compatible with original models and you will need to apply the same XY compensations as you do for original model.

For changes see pictures.

• Magazine (D1) & Floor Plate (D4) should be used together: modified magazine is not compatible with non-modified floor plate and modified floor plate is not compatible with non-modified magazine.

This is WIP, I'm also changing some other parts at this moment.