The high strength shafts are a great idea and welcome addition.
The clamping collars and spaces are listed as “coming soon” or “on backorder.”
Until these are available, would home made functional equivalents be allowed in official competitions? I would like to use pieces if 1/2" nylon air line cut to 1/8",1/4",3/8" and 1/2" for spacers.
For clamping collars I would try plastic or metal collars with a set screw.
A ruling here would make the decisions at each match more consistent.
I would be helpful to teams if “coming soon” and “on backorder” included “expected date”.
Let’s take a look at <R7b> which deals with replacement parts.
The rules permit for identical replacements, not “functionally equivalent” replacements. As such, the items you’ve described would not be legal for use in VEX Skyrise.