Single to quad 18650 holders with keystone terminals

Not found an 18650 sled that suits my needs.
These are all 20mm wide x 80.55mm long.

Designed for unprotected cells, it is not far off fitting a protected, you could probably print 2-3% larger and it would fit them without upsetting the other dimensions enough to make a difference. 1mm longer would probably do it, so 2%.
The spring on a flat top is compressed to around 3mm deep, a nipple top unprotected should just fit. I have none to test with, I have another 1mm compression available th