Well I don't see why there would be a difference between innerduct and copper. The first time I overlashed on copper was 2500' rear easement, ANMW50 on a BKMP25. Worked fine with using a C. Have over lashed on BKMP200 using a J, but only for a couple of spans, and had no problems. Not that I cared to do it, but that is what the company wanted.
This is CABL.com posting #227856. Tiny Link: cabl.co/m7rg