i was not aware that you could pop the spool off of the stratospool! very neat to know!!!!
there were two frame sizes for them....the big one was almost 4' long as i recall.....
there is enough info to build your own now since the maker is no longer producing them...http://robroy.dyndns.info/KAP/KiteReels/Stratospool/details.html
according to that page there was actually 3 sizes of SSs available
STRATO-SPOOL No. 8 6.5" dia. spool, 22" long frame holds 1000' of 50-75 Ib line, for kites pulling 10 Ibs or less
STRATO-SPOOL No. 16 7.5" dia. spool, 24.5" long frame holds 1000' of 100-150 Ib line, for kites pulling 15 lbs or less
STRATO-SPOOL No. 24 8.5" dia. spool, 33" long frame holds 1000' of 200-250 Ib line, for kites pulling 25 Ibs or less
loads of good info on all sorts of different types of winders......http://robroy.dyndns.info/KAP/KiteReels/reels.html