Yep, that's true (regarding interchanging the PSUs)

However, how many Timesteps have you exported to America? There surely can't be that many.

If Jeff PMs you his friend's name and an approximate date of purchase you must be able to find it amongst the invoices in your paperwork. I could do this with the sales from my own business, no problem.

No-one else is selling the Timestep on your behalf, I presume?

Marco.