I will be using my Roland A-800 Pro midi keyboard with my Ketron SD90. Roland does not make a bag tor the A-800 Pro which is 40 inches by 10 inches in size so I bought a Gator Slim bag for it. The bag is about 4 inches to deep and I wanted to know if anyone has customized a bag so a smaller keyboard would fit without flopping around in it and if so, what material did you use to fill in the extra space.

Deane