I believe it was on your original thread, it was on an exchange basis.

Thanks Whee ! I appreciate your advice and will use it. I am presently trying to locate an old type 
gear lever ( factory for change ). I haven’t been able to get under the car, but I just finished ordering a pair
off the bobbin mounts for the case. If it’s not needed then it will be spare. Any idea where I might locate
an old type ? Thanks Whee !

I'm not sure I've actually seen an explanation of what exactly the problems you are having with transmission? I apologize if I missed it.

While I will not claim to be an expert, I will share what is being done with mine.

Symptom:

Hard to shift, very imprecise when it does shift.

Troubleshooting: 

Pumping pedal helps a little, but still not acceptable.  After partial disasssembly very clear that all linkage parts are very worn. After putting up on lift, clear that coupler housing is worn (lots of play in roll pins)

Proposed solution:

1) Replace coupler housing and roll-pins with new
2) Replace shift linkage with reconditioned unit. (including removing quik-shift).

I might have looked for a second hand shift lever and worked with the rest of the existing shift linkage I already have, but since I recently had surgery am having to pay for labor versus do it myself - so my current approach has more of a bias towards replacing parts versus rebuilding.

Hope this is helpful.

Thank you bluebox, tank you Malcom , and thank you hunter2 for pointing out these “likely “ trouble 
spots. It all makes great sense. Malcolm, I didn’t see where the seller offered to give or swap for sitters, 
but I will contact him tonight. Greatly appreciated all !

Also  Dan, Bill C, and thorty, thanks for you help
   Darren.

Thank you Dan. I’m a really hoping that something simple will repair my Mini trans. I suspect either
the quick shift kit , or the rod change mount, or both.
       Thanks for the help !
          Darren.

Yeah, wait until it is warm enough to spend time in the garage... if you and find it in all the snow. It is very unlikely the transmission is bad and very likely the notorious quick-shift is the issue.

derwood..  ping  Steve Gibbs..  aka Cooper Tune Racing..  best in the USA  and he is in Vir. Beach area.. In canada.. I would use Rob at Mini Man in Carp, Ontario..  later bc

There are also rubber bushings that wear on the rodChange shifters causing poor shifting. I bought a car from someone once at discount because the po thought it needed a gearbox rebuild since it want staying in 2nd gear . Wound up just needing the $20 bushings and hasn't been a problem since. 

I agree get a good used factory shifter before you do anything else.  Had trouble with an aftermarket item crossing USA from Arizona to Maryland in 2006.  Fortunately was able to sort it myself.

Going back to OEM rod-change shifter is the simplest least expensive first step.

Darren, it is not likely that a local transmission expert has ever seen a mini gear box. You need to get to the bottom of that quick shift. Many people have had issues with them. If you finally end up needing a proper gearbox, you should call on Don Sobering at Britain West Motorsports. Cheers

    I’m wondering if there is one or more good , experienced Mini transmission repairman in Canada ?
  I may need to have mine looked at. Will the local transmission pro shop be able to rebuild a Mini A+
 4 Speed  ?
    Thank you ,
     Darren.