IMO you really chose the right path to get to where you want. Straight comb - and find straight-combed (smallish and non-floppy - and bonus if she has 6 points) female for breeding to get the crest you wish (and keep the good comb that you already have). Smallish female crests will help with the development of a straight comb in your cockerels IMO. Luckily for me - that is the female crest that I prefer...No my cockerel as no noticeable crest I have had some with it but there combs flopped over .I culled them all this cockerel has a straight comb but no noticeable crest or what can be consider a crest on a male a feather are two ?
For folks who don't want to breed a line for roosters and a different line for females -- the look of the original CL before they went bouffant - kind of is an easier path to get a person's CLs closer to SOP appearance without double breeding.
BTW - when I was looking at your rooster and wondering about the crest---I noticed a LOT of really excellent attributes that he has.