My BDL came with a starter also and I have not had that problem. What exactly is interfering? Are there any marks to indicate the exact issue?
With a old Primo belt drive I had to file the teeth on the starter gear to get it to engage properly. Not that it is the same as your problem but it may take some modification to corect the issue.
With a old Primo belt drive I had to file the teeth on the starter gear to get it to engage properly. Not that it is the same as your problem but it may take some modification to corect the issue.