Aw...you're just sayin that to make me feel better. [And it worked!]
We may be better served using these as how NOT to create smb beds:
Use of rubber feed tubs was recommended by Dave Willis in his experience with SMB reproduction in KS. Prevents rock from sinking into clay and also helps prevent siltation over time of rendering beds useless thrones of muck [that was my college band's name, btw]. Great idea by Dave - however, dimensions dictated by using tubs as foundation for beds are much smaller than recommended by Eric West. Rolled the dice and thought siltation protection trumped recommended larger bed size as these tubs had already been used for spawning successfully by Dave in KS once upon a time. Silt kills eggs and buried rock EVERY time. What's a meister to do?
Smaller than recommended dimensions:
Vary your depths to help ensure a spawn:
Here's a bed created following Bill's published instructions via mag...now THIS looks promising!