What people rarely mention is that the T-2000 came with throat welds that improve its stiffness. The racquets that have these have a little sticker that says "firm".
As far as I know, Connors only used the welded model. I have hit with a T-2000 with the welds and a T-3000 without the welds, and the latter felt more flexible. A lot of the complaints about the T-2000 being too flexible probably come from people hitting with the model that lacks the welds.
Local place wants $50 to string one, btw.