ScubaMilo:I would not recomend the swap back and forth method.
For one to be done right a torque wrench should be used.
Number two if you were to screw up the threads some how, you could be left buying a whole new reg.
I vote for bite the bullet and spend the $20-$40 dollars it cost for the adapter.
Just my 2 cents take it for what it is worth,
Milo
Well yeah, I mean if you're a total dork then by all means, buy the converter.....
Actually, Milo has a point. If you're not confident get someone else to do it for you. Either way, do *not* throw away your old yoke or let the shop keep it.
R..