I have 2 of these 10/m/90/25 long necks. They’re about 2.75 inches of clearance between the back of the bucket to the front of the joint. This should give you ample room to keep the rig away from the heating element. These feature a perfectly flat top and a perfect bevel.

*due to thickness at the bottom of the bucket - do not use adapt tech inserts in the standard 25mm, I make a bigger size for that