I just got back from Indo and I took my spit with me and rode it only a couple of times over 2 weeks. I also took my hellfire and a 6'8 Aloha AF2 turbo (quite similar to the alternator but less volume). Next time I think I'd leave the spit at home and just take 2 boards instead...I'm thinking of a 6'6 alt to replace the AF2.
The spit is a great board for weak waves but you won't find that many in Indo except perhaps on weaker sloppier days along Kuta/Leggian/Seminyak strip in Bali. I have not ridden the activator but I think I'd be leaning towards that, the foil is a little more refined and it appears to have a tad more rocker. So it looks to me like a better small wave board for Indo.