Question for DIY Portable Mouthpiece modders

Hello to everyone

I’m a long time DHVaper who has a ton of portables

One of my favs is my Boundless CFX save the horrible mouthpiece included.

I’ve been looking for a long term solution to modding a different mouthpiece and I’ve tried a couple of methods but

about 2 months ago I tried filling the oven half way and using my Healthy Rips Baller stem.

Seemed to work reasonably well especially if you don’t fill the oven too high and I know borosilicate can take high temps but I’m

a little concerned it might be too much heat directly on the stem. I don’t want it to break inside the device.

I’ve seen tons of people use similar glass in their vapes but I don’t think they were directly inside the oven.

Any thoughts on how risky using it this way may be would be appreciated

The boro should be ok with the temps, just don’t cool it really fast after getting it hot.

I mean I’m ok getting a back up Baller Stem but that sounds like a good idea anyway

Thanks