I would think it is. Might be worth contacting Music Hall themselves though, and seeing if they can help you - they have a good rep for customer service. They're a rare brand over this side of the pond. Project have the lions share of the market here, having much of the same DNA as they do. I believe the motors are interchangeable - so might broaden your scope for parts.
Have you checked the obvious - is the platter spinning freely? Have you tried running the motor with no load to see what happens? What gets hot, the motor or deck? If the latter it may be something awry with the speed control or PSU assuming it's inbuilt...
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Before you criticise a man, walk a mile in his shoes. Then, when you do - you'll be a mile away. And have his shoes.
Wavy grooves go thru a RigB 540ML on an SL1500C. Digits stream from a cheapie CDP and a Sonos, into a Yamaha 803D driving Kralk Audio little 'uns. I used to have a Linn but I'm better now.