Our pack does Space Derby every year and loves it. We actually do all three derbies every year, Raingutter in fall for recruiting, Space in winter, Pinewood in the spring.
I started with the plans in the Cub Scouts Leader How-to Book (available on Amazon). It uses basic hardware store lumber and materials. However, being a woodworker and engineer I may have highly modified the “plans”. I lowered it from 8ft tall to 4ft, added cross-bracing, modified the start gate, made it tool-less collapsible, etc. Still a work in progress so I haven’t done up any drawings. The basic plan from the book works just fine though.
BestTrack makes an aluminum Space Derby track similar to their Pinewood tracks, though not sure how shipping would be to your side of the globe.
-Have side activities for the Scouts, Space Derby is not as fast-paced and interactive as the other derbies.
-Have leaders/adults do the winding. Although I am designing an automatic winder to integrate into the starting gate (ya, I’m that guy), the derby moves much faster. I can wind a rocket to 100 turns in under 20 seconds, no band-aid required. Also makes for some mini-competition between the winders, we get the crowd involved cheering the winders between rounds.
-Have two winding “teams”, one pre-winding the next round.
-Loading/launching/retrieving the rockets is good Scout involvement that doesn’t slow things much.
-Replace the garbage line that comes with the kit from the Scout Shop. Use a high quality synthetic line, much stronger, lighter and slicker (no lube required).
-I have not found a glue that will hold the hanger clamp pieces together (the part that rides on the line and holds the rocket). I used little #10-32 fasteners to reinforce and keep the clamp from breaking open.
-Spare parts and super glue! We went through rubber bands, hangers and fins falling off, and even broke 2 props this year (new record).
Hope this helps.
Yours in Scouting,