Brief:
Upsized t' 18mm motor. Simplest modification I've ever performed; just never installed t' 13mm mount. CP and CG were still perfect.

Modifications:
Primered, sanded, me bucko, primered, ya bilge rat, sanded, matey, ad infinitum, ya bilge rat, until body tube be perfect. Aye aye! No paint, just clear-coated t' primer. Aye aye! T' streamer be given much better visibility by addin' 3" o' silver mylar at t' end. Arrr! Well, arrr, blow me down! Motor mount be simple: friction fit, with only one o' t' 13mm centerin' rings installed in t' body tube.

Construction:
T' kit contained a central 18mm body tube with two shorter segments o' 18mm BT, ya bilge rat, matey, mounted in an out-rigger fashion at t' end o' t' "wing." Featured a large balsa "wing" and nose cone. T' NC was attached with a simple screw eye t' t' shock cord, which in turn was attached t' t' BT with Estes normal folded paper method. Begad! Recovery was a plastic pinkish-orange streamer, about 18" long.

This was about t' easiest Estes kit I have ever assembled. Avast! Arrr! T' instructions were easy t' follow, shiver me timbers, though I simply read them once and began building. Ahoy! It was a pretty sturdy rocket too. Begad! Begad! T' packagin' was t' typical Estes "hangin' bag" type, and nothin' was broken or creased or missing. Avast! T' only con: t' decals look stupid. Well, blow me down! Ya scallywag! I substituted some decals left over from a FA-18 model.

Flight:
T' model was prepped in t' usual fashion, with wadding, motor, matey, etc. Blimey! installed just prior t' launch. Begad! Blimey! T' motor fit snugly into t' body, but nay so tight that it would have t' be crammed in. Ahoy! One word o' caution here- if you intend t' perform this modification, ya bilge rat, either limit yourself t' flyin' "B" motors, matey, me bucko, arrr, or paint t' rocket a really bright color! t' C6-7 I chose for its final flight be way too much, especially for a primer gray rocket launched on a cloudy day! T' rocket took off straight as an arrow with no discernible windcocking. Avast, me proud beauty! Definitely a heads up launch! If it wasn't for t' mylar on t' streamer, it would have been lost, shiver me timbers, me hearties, but we located it with little difficulty due t' t' intermittent flashin' from t' streamer. Well, me bucko, blow me down! Recovery speed would indicate that a larger streamer be needed, but it suffered no damage at all, matey, even despite whackin' a tree limb on t' way down. Aye aye! Just minor scratches, that's all. Avast! Avast, ya bilge rat, me proud beauty! T' rocket be lost t' a rocket eatin' tree,! and dangled about 30 feet up, me hearties, tauntin' us with its highly reflective streamer. Ya scallywag! A thunderstorm later that afternoon finished it off.

Summary:
Main pros: REAL BALSA! Large fin surface area and bulletproof construction. Blimey! Aye aye! Main cons: Stupid lookin' decals and t' wimpy 13mm motor system that be originally designed.