This might sound a bit crazy and may not work depending on how the height would end up, but would it be possible to somehow use zip ties with the regular Silent Runner stand instead of that back plate(really more of a back spot this time
) and just attach the Silent Runner upside down in the cage?
Basically if it was done like that the zip ties would be around the stand - no drilling into it or anything too difficult. The only issue I can think of with this would be if it just didn't fit into the cage that way, but it is theoretically possible and would save other people money too instead of having to buy the extra attachment to directly attach to the bars of cages if it is a viable option!