Paula,
Haven't used a possum board for long but have made two, last one much better - lighter and can fit most any dulcimer but if I made another one and raised the part to hold the dulcimer and made it only pencil wide, I'm sure it would make the dulcimer sound different. Other members will have a better answer but below is what I have found out so far as I am learning about the possum board and what it brings to the dulcimer.
1. What I have found, using only mine is it does raise the dulcimer up a bit on your lap so you will need to readjust your playing style some.
2. Where the board would fit any dulcimer, not all dulcimers sound good on it. My McSpadden maybe doesn't need one, since I fell it bounces the sound around more than boosts the sound.
3. If you add felt so the dulcimers doesn't get scratch or if any loose clothing overlaps the board and makes contact you will damper the sound.
I would bring the dulcimer you most want to put on a board or several dulcimers to Jm's and try it or them out. Good luck, let us know how it goes.
