I think they would probably work well. I have the preload set to the firmest setting now but you could easily soften them up for your spider box. I used to run a set of TRX shocks on my daughter's Spiderbox and liked them with me riding it, but they were to stiff for her weight. I finally removed them and used a pair of 350 Ody front shocks exactly like what I just removed and I think they work very well on her Yerf. You might consider trying something similar to them on yours.
These are the TRX shocks when they were on it..
And with the 350 Ody front shocks on the rear..
