I never really got what the Jack-o-lantern disc was, and it wasn't until I tried to 'collect' the discs more seriously that I properly discovered it. It's brilliant, so much better than all the 'gliding' cloaks and wing discs. I love to use it with yoda, as it's like his repulsor-lift chair from the prequels! ( It's also like The Mekon's chair from Dan Dare. )
Also, I don't know if you mentioned having Kylo Ren FX, but I bought him today as he's £6.99 in GAME ( UK ). They're even 3for2 if you wanted to trade or sell-on as spares and make a little dough to help the collection along.