Just got a very definitive answer from the one and only Andy Brown. Here's his post:
I'd say scratch built tub with Crapshooter sponsons. The turnfin is .21 Mongoose (1986) as is the engine plate with the large offset. Engine is mounted level with an S-bend shaft. Same as was done in the .21 Mongoose.This boat was probably built around 1986-87.
The twenty or so years ago would fall into that rough time frame as it's been 30 years, based on his build date.
If you have any questions on Andy's ability with riggers, here's part of his signature on the other website:
First R/C boat - Dumas Dragonfly 40. Built 1973. Designed Mongoose 1984, Eagle 1990, Jaguar 1994, Eagle SG 1996, SGX 2001.
IMPBA member since 1976. First Internats 1977. NAMBA member since 1977. First NAMBA Nats 1978. APBA member 1989.
Multiple Record holder in IMPBA, NAMBA, APBA. First IMPBA member to officially exceed 100 mph and 125 mph.4 time IMPBA US-1 National champion, Presidents Cup, Bill LeFeber award. Hydro Technical directer (wrote Hydro definitions), District 3 Director. Two time NAVIGA World Champion. Designed developed the highly successful MAC engine line. Helped a few other r/c boaters succeed. Designed and developed four uniquely different Riggers over the past 30 years. All have set records and won major championships.
Last edited by Hydro Junkie; 01-18-2018 at 07:34 AM.