Time to build again - Estes Bull Pup 12D Upscale

After a bit of down time I decided it's time to start building some of the old kits I've got stockpiled in my basement. After reading some reviews on RocketReviews.com I decided to hack an Estes Bull Pup 12D. My kit is a boxed “Explorer Series”, EST 7000 on the box, labeled “Skill Level 2, with altitude of 245 meters (800 ft) on C6-5. I paid $8.96 at WalMart. My kit has the contents in a sealed plastic sleeve, with water slide decals and a 12” parachute that needs assembly. The instructions are for an “Estes Explorer Series Bullpup 12D Flying Model Rocket Kit EST 1972”. My box contains an Estes/Cox mini catalog with coupons that expired 12/31/98. The current EST 7000 kit sells for $32.99 retail ($15.32 on Amazon as of 7/26/22). I decided to upscale it from 18 mm engines (B's & C's) to fly on D/E engines per https://www.rocketreviews.com/estes-bull-pup-12d-frank-ross.html I'll PROBABLY just fly it with B’s & C’s unless I'm launching at ...