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

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

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

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

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