Taylor,
There are other types of couplers out there but they all have their own advantages and disadvantages. The best results have been produced with Oldham couplers in good condition where the gearbox and worm shafts are well aligned. The main issue with doing this is that there have been multiple versions of the Losmandy mount drivetrains in use over the years. The best version drivetrain was the original OPW setup that carried the gearbox and worm on one platform so there were no changes in the alignment of the gearbox shaft and worm shaft while backlash was adjusted. This has been lost with the gen-2 OPWs but the OPWs are half the cost now. So the best advice is to simple get the shafts aligned as well as possible to minimize the very small angular velocity changes of a misaligned Oldham coupler.?
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Chip Louie - Chief Daydreamer Imagination Hardware
Chip Louie