I made a folding "wedge" from a hunk of doublewall shipping box. Much like the Markbass one with an extra go around so it doesn't need velcro.
Choice of low or high, further back for extreme tilt. Solid enough, weighs virtually nothing and stows snug in the slot port, gotta love ghetto diy.
Team Trace Elliot #1, IWNBARMPB Prezident, Mediocre Bassist #399, Old Basstard #86, PBBBC #2