2Tools emulates a tape machine (if you don't have one) and allows you to still use the SSL computer automation with ProTools.
If you want to use a real tape machine, you need to stripe a track with SMPTE, send this to the SSL computer, and you don't need a 2Tools.
If you want to sync the tape machine to ProTools, (and maybe the SSL computer at the same time) then you will need something like an Adams Smith Zeta III, which will pull all the sync together.
ProTools would be the master SMPTE, and the tape machine and SSL COmputer would be slaves.
I've not got a Zeta III, but assume that last comment is correct in the hierarchy of master/slave units.
Anthony.