Hi Ken,
Several years ago, I de-forked a 10″ LX200, attached a long Losmandy plate using Losmandy saddle fixings, and used it on a Losmandy G11 mount. That was easy to do and performed much better than the Meade fork mount. I even sold the redundant Meade fork mount for spares as it was no longer functioning.
I’ve no experience of a Warpastron harmonic mount apart from saying you need to be very careful about balance, not because of the mount’s function but because it could fall over due to off-axis loading. I would suggest that most mounts should not be loaded more than 50% of the manufacturer’s max load figures for good, smooth operation.
Good luck
Peter Carson