I don't think you should to be honest, if I want to ask a planner-esque question I'll whack it in for all to pick apart not just planners. When this forum moved from the old one it fragmented heavily and as a result lost traffic and participation, further fragmentation would do the same to a forum that is just starting to get back on its knees. Why would planners need their own forum? If it's advertising related it should be for all to rip apart