Ta49 upgrade...how big

[qwic87gn]

If I send in my precision TA49 to get it upgraded, how big can it be made? Can it be made into....say a ta66? How much would this cost me?
I know the best place to ask these questions would be directly to Precision. But, they didnt reply to my email, I'll ask again later I guess. But, maybe someone here knows that can tell me sooner than they will.

Thanks