Whether or not to add a second stank and make the changes talked about, i wanted to ask: Do these games allow things like railroading? (as well as a whole host of other questionable tactics like skirmisher contraction, double-flee, conga-line into buildings etc?). Im not too fussed either way, as long as both sides are agreed.
The only reason i mention is that a stank can easily be railroaded to have virtually no influence on the game. High elves have access to eagles and cheap reavers which can do this VERY well. Having 1 stank neutralised might be salvagable - having 2 would not be.
An alternative to this would be to get another ordinary cannon. Its a cheaper solution (allowing us to keep most of our other options) and still works very well in an otherwise all-cavalry army.
Ive never tried a BSB on peg before, but as George said in theory it works well. Id give it a go.