I'm putting the finishing touches on my 2.5X Big Daddy. It will weight in at about 20lbs to 24lbs when on the rail. It will fly on a single J, K and with two air started I's or J's on special occasions. Should I use a 1010 or 1515 buttons or set it up to use either.
Ron
Ron, if you have the space, etc. to go w/ both sized buttons, you will be glad you did. It is good to have flexibility.
In case you have to go with one or the other, I'd go with the bigger ones. You may want the longer rail, and 24# is pretty heavy for the smaller rails.
Sounds like a nice project!
JW
Agreed, go with both, versatility is great!
Art