Consider that the price of buying just one or two other MX's is still 'cheaper' than getting yours CLA'd. A lot of these are 'dumped' at the market right now. I know of course that buying another one is still a risk, but for GBP 100 or 200 you can buy a lot of MX's.....

(my preference would be to do the CLA-job myself)

Please share your experience if you use Leica R lenses with an adapter on a film SLR Pentax. I read that there are certain adapters around that could replace the original R-mount so you might be able to use those R-lenses on a K-mount pentax.
Before trying this myself I would like to know your experience.