Hello there,

we want to manufacture round Tee pieces with use of our stock pressed collar saddles - much more easy than manufacture whole Tee with two parts.

The goal is to get straight piece of duct with oval hole. I can of course draw rectangle in opus and put hole in there, but it is quite complicated, as there are nearly infinite number of possible configurations of terminal duct and branch. We have tried to use casual straight pipe (cid 41) with hole - it works quite well for fittings, where branch is much different to the main duct (for example duct 200mm, branch 100mm) - but there is problem with Tees, where branch is same like basic duct. The hole must be sligthly larger than branch, which means the hole for tee 250/250mm must be like 260mm (hole diameter in the development). Cam duct represents such hole as impossible to cut - as the hole is made as projection - but i need round hole on the development. Atatched is what cam duct produces, when I try to add hole dia 265 to the DN250 duct...

 Any suggestions for this?