I don't know what I would consider a colourbomb. A horse can have all the patterns but if none of them are home it can still give plain foals. So as a colour breeder having a horse be homo in one or two desirable traits is more appreciated than a 1/1 that looks fancy but spews out colour dodgers.
Totally changed the mane and a lot of other things, but I'm overall very pleased with the result! I don't regret experimenting with different body prep techniques!