describe what kind of down rigger set up he has
Pic #1, both outer riggers are Penn (Fathom masters), Pic #2 inner riggers are Big Jon's(Captain's Pack or Pro tournament). Both electric$
The raised pedestals going left to right with a cross plank/platform i"ve fished seems to work best IMO for most reasons like elbow room, tangles, esp if your running more than two riggers, but the pedestal and plank sorta becomes permanent fixture and that's okay if that's what you want to build/have.
With detachable base plates, the riggers can be removed easily but of course the plank and pedestal usually stays.
If your running just two rigger's, use detachable base plates mounted just to the gunnels on left and right stern works well too.
I run four Big Jon's on detachable bases, they are fore and aft of each other on the gunnels on both the port and star sides. I run the two aft most straight'ish back and the two fore riggers out to the sides. I don't necessarily want a cross plank on the back of my raft but been thinking of how to build one that is easily removed due to when running four rigger's, going left to right makes best sense esp. if you get serious.