A big thanks to all who put their input to this thread!
My newly purchased bundle of toy had the occasional FI light problem with 2 flashes a few days apart (the problem that is, not the time between the two flashes!). Followed the instructions and found the "5-way wax" (60,000 kms on the clock). Took me over 2 hours because I'm not really mechanically minded (stubborn, though), but the instructions were spot on of course. Did it on a cold Adelaide day, so the tubes connecting the 5-way were immovable at first, but a heat gun from around 30cm away on low setting softened them up enough to slide off and, later, on easily for me. Was more worried about damaging the tubes with heat, so probably over cautious there; better safe than sorry, &c.
What a great resource this forum is!
Scanning the threads for the next weekend project now...