Difficulties with wearing a device? discussion

I just picked up the biggest cage available with an attached urethral sound (80mm). It’s long enough, but the inner diameter is only 32mm, making it tough to push my penis inside.

It’s tricky finding one that has both the width and length I need. I have a non-sound version that mostly fits, but not quite what I’m looking for.

Any tips on how to get my penis into this cage?