Matthew,
If you try the BDR cones, you'll need to get the adapters from BDR too. The thread size of the BDR cones is different from the thread size of the Gallo cones. I don't remember the difference in sizing off hand, but BDR sells a short adapter. It is somewhat short though. I actually had a local machine shop make up longer threaded rods so I'd have some room for adjustment.
Rolloff
If you try the BDR cones, you'll need to get the adapters from BDR too. The thread size of the BDR cones is different from the thread size of the Gallo cones. I don't remember the difference in sizing off hand, but BDR sells a short adapter. It is somewhat short though. I actually had a local machine shop make up longer threaded rods so I'd have some room for adjustment.
Rolloff