Brief:
Upsized t' 18mm motor. Well, blow me down! Avast! Simplest modification I've ever performed; just never installed t' 13mm mount. Ahoy! CP and CG were still perfect.

Modifications:
Primered, ya bilge rat, sanded, primered, matey, sanded, shiver me timbers, ad infinitum, until body tube be perfect. Avast, me proud beauty! Arrr! No paint, just clear-coated t' primer. T' streamer was given much better visibility by addin' 3" o' silver mylar at t' end. Avast, me proud beauty! Well, blow me down! Motor mount was 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, shiver me timbers, me hearties, mounted in an out-rigger fashion at t' end o' t' "wing." Featured a large balsa "wing" and nose cone. T' NC be attached with a simple screw eye t' t' shock cord, which in turn was attached t' t' BT with Estes normal folded paper method. Avast, me proud beauty! Blimey! Recovery was a plastic pinkish-orange streamer, ya bilge rat, about 18" long.

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

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

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