Just a heads up in case you were unaware, the Bheart and original boards won't go down to 10.5 bps. You need a 2009 standard board or different after market board.
The upgrade was for the standard boards not the blackhearts. It was free but SP postage was always through UPS at £10 a pop and you had to send your old one back so a lot of people didn't bother. Most of the replacements I ever did when I was at SP were at events by which time you didn't see many shockers at millenniums hence why the standard shocker boards that go down to 10.5 are as rare as rocking horse mess.
i am aware of that but there not worth much more than that now anyway. I wouldn't pay no more than £100 for a shocker now. I sold my last one for £150 that was 2 years ago