I apologize in advance if this has been the subject of conversation in the past.  

I am working on a transcript wherein the attorney making objections uses the word "but" in every objection to let the witness know he can answer.  I'm having a hard time punctuating some of her objections due to the length of them.  They look like long run-on sentences.  

Anybody out there have an opinion on how to punctuate these objections:

Objection, lacks foundation, but go ahead and answer, if you know.

Objection, asked and answered, but go ahead.

Objection, lacks foundation, calls for speculation, but go ahead and answer, if you know.

Should "But go ahead and answer, if you know" be a separate sentence?  If so, should I make it a new paragraph since the attorney is, first, making a record; and second, addressing the witness?

Should "But go ahead" follow that same logic even if it is only three words?

I'm having a hard time finding a way to be consistent with her style.

Thanks in advance for any ideas!