Hello again Solirossi,
I forgot to mention one critical thing with Model 45s.
It is the issue of the soundness of the frame.
In recent times it has been noted that some Model 45 frames with two rails
supporting the engine have suffered from cracking. This is expensive to correct.
[Earlier machines had one rail, a single piece of plate steel supporting the engine.]
So.. it would be important to confirm the engine support frame is sound ...free from cracks.
Hope this helps.
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JACK.