I was advised to get the TA up to 100, let it settle, then adjust the Ph slowly down to 7.4-7.6, and that because I am using TABs - the TA should be over 80. Is that not correct ?

Calcium is around 220 according to Leslies.

I found a Dealer nearby that carries a Taylor K-2005, is that acceptable ? - Seems like it does everything the K-2006 does but uses color comparisons rather than drop counting.