pharohoknaughty
By the way, (slightly different topic) if the bakers are thinking of reworking the export, I hope they figure out a nice way to have the resulting WAV file only as long as the longest active track.
SONAR already does this. If you clear the selection by selecting "nothing" SONAR the output wave will indeed be as long as the longest track. This also applies to source category tracks. When you export with no selection it will create waves as long as each track.
And regarding tails, the simplest way is to extend the end of any tracks to the length you wish for their tail to end. SONAR has no way to know how long you wish the tail to continue. You can simply extend the end of any clip by dragging it beyond the physical end of the wave data.