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A third button may be challenging to add on that long of a BT now that it is built, unless you can put it into the forward CR (not sure where that is or if it is wide enough). Most 1010 rails I've seen at launches are 6', but on my personal pad I can go to 14' (for those sweet long-burn, low thrust motors). You could always buy a 4' or 6' 1010 rail section with connectors and add it to a club launch rail, so you have enough length, especially if you are putting a high thrust motor in it. I wouldn't trust a launch lug in that situation.Thanks for the reply. I had someone in another group advise that it’s likely safe on an 8’ rail and probably ok on a 6’. I’m not sure what length my club (Oregon Rocketry) has.
I’m hoping to fly it this weekend and if I need to just use the launch lug, then so be it; I can see about adding a 3rd button in time for the next launch.