I would say that a reasonable representation could be obtained by filling/removing the wooden segment surface detail on the Meng parts to leave a smooth disc with just the rim and hub detail.
The wooden idlers were a bit thicker at the hub than at the rim, whereas the metal ones appear to have been a constant thickness. Hard to change the kit parts thus.
Fair enough, A quick double check at pictures makes it seem like filling the wheel between the hub and rim would be more accurate. I kinda assumed that was going to be needed, just wasnt 100% sure.
Atleast I have spares incase I mess up (I have the cast turret FT-17 aswell*).
It's certainly a shame that the conversion set doesnt include them, though!