Could you post some pictures.
Bridge feet contact area
I have completed a "what if" all poplar hourglass instrument, 26.5 VSL and the fretboard "floats" it is only in contact with the top at the peghead and tail block, otherwise about 3/16" clearance full length. The bridge rests directly on the top with no contact with fretboard. Right now the bridge feet each have about 1/2" x 5/8" bearing on the top. A previous trial build has fretboard attached but stops short of the tail block. It is walnut with butternut top. The two builds have very similar volume and tone. I was thinking of decreasing the footprint of the bridge on the top to see if it changes anything. Both instruments have bracing under the bridge area. I am going to go to a size heavier strings also on the poplar instrument. Does anyone have any thoughts on this?