Frank a while back you asked this same question a different way
Here is a review of your ?? and my response...
https://stunthanger.com/smf/open-forum/fox-36x-abc-pistonliners-why/msg393627/#msg393627I think there is another thread where Tim Wescott or maybe some one else ( Bootlegger, or maybe even you, I have way too much short term mem loss) questions the wisdom of the expense to refurbish a so call obsolete engine with parts costing more than the base engine
answer is the same
BUT to expand a bit because it is not always about keeping a favorite good engine alive for future decades of use
Brian has a rep of creating parts that can make engines much better than as they were designed
Some of his stuff can take a mediocre engine and make it bad assed....or better behaved, or last longer, or all of these attributes
Brain is not the only game in town either... Randy Smith can hot rod a lot of engines OR sell you a, no BS strong, LONG lived stunt engine
Other guys like Lew Woolard can apply their special magic even at 93 years old he is still doing his thing
Tom Dixon is out there and reworking engines like OS FP 40s to be 4-2-4 and we know there are some who strongly disagree with these mods...preferring to run them as designed and manage the power with tank, fuel, and props
And one can always collaborate with Henry Nelson for a one off super engine or get enough pre orders spoken for a new 50 each run of some great engine he designed
I am sure there as some other suppliers I have no experience with...but know they exist Like Dough Galbreath for free Flight
What we can not seem to do is convince Super Tiger, OS, and many others to get back to supporting the control line crowd with lower cost production engines
Don't forget there are thousands of good RINGED stunt engines out there with ZERO good wear part support
So OK yes a OS LA 46 is a pretty mundane and designed to be low cost engine... but a lot of folks, late to the table, acquired 2 to 10 of them (NIB or Use) just because many forums have such high praise of its mindless easy stunt use for a vast array of models
As I write this it occurs to me that of the thousands of OS LA 46s still in use....less than 100~150 will ever see a BG P/C ABC UPGRADE