Is anyone out there familiar with Bet Angel, specifically Laying at SP? I'm just trialling it and the excel integration seems great except for one thing? I'm pretty sure Gruss users are in the same boat?

Unlike Betfair's website where if you want to place a Lay bet for a liability of say $500 at SP, easy, click selection, nominate liability, Take SP.

With Bet Angel & Gruss, if you don't want to accept Exchange Lay prices, you place an out of the money order $1.01 on the exchange and Take SP if unmatched. That's simple enough BUT there's no provision to nominate a liability amount only a stake amount. So do I divide $500 by 0.01 = $50,000 and that is my stake?

I've had an answer similar before from CP but only with reference to a Back SP bet. I've posted the question on Bet Angel's forum, but can't get a knowledgeable response.