Hi Jacquie,
I had exactly the same concern. A bit of force will not damage it. If you need to undo it now, the red polycarbonate strap wrench from Bunnings and applying a little bit of anticlockwise pressure on the clutch handle will bring it unlocked. Remember to put counter pressure on the Dovetail Saddle at the same time.
Reason why I recommend this particular strap wrench is that it is not made from metal parts so is much less likely to scratch/mark your mount.
Graham makes the teflon clutch to suit the different MT models (apparently one model has a different internal diameter) and will definitely fix it. You will be surprised.
The clutch handle mod is particularly useful as is the tripod and spreader arms to make the tripod more stable. I also like the hand controller cradle rather than having the hand controller dangling off the pin which is the original Ioptron method.
Not sure if Graham does extension cables so it might pay to ask him.
However if you are handy with a soldering iron or crimping tool you could make one. You could get all the parts at Alltronics in Northbridge Perth
http://www.altronics.com.au/index.asp?area=cont
Hope this helps.
Cheers