I can't see a patch for the 1973Mk2 TS on TSC, but it was updated last year on 25th March and this may be worth checking out. The older version which I have includes a couple of 512x2048

textures for the brake animation that may be the source of your problem. Both this and the power handle texture could be significantly reduced in size and that may have been done in the update.
That said, I'm a bit surprised your recent graphics setup is baulking at the transparency as my ancient system handles it fine. Might be worth investigating your driver, but see my experiences on the TSC thread pedned linked and be prepared for frustration!