[different infills within the same model possible?]

Hi there

 

I have an ENDER PRO 5

 

I printed this character in upright position with an infill of 20% (PLA).

Its left leg turned out solid enough, the right leg was too weak and broke off.

 

In order to keep the infill to 20% I added two stabilizing cylinders inside the lower legs in BLENDER.

I exported the character with the two cylinders inside as an STL-file.

-> those two cylinders were not printed 

 

my questions:

1) is it still somehow possible to print those two cylinders within the mesh/character?

or

2) is it possible to have a 80%-infill in the legs but a 20%-infill in the huge belly (in the same print)?

or

3) any other solutions?

 

thanks a lot for your reply!

 

Threeo