I still say no.
Look at some newer bikes. GIXER's come STOCK with foreward facing mirror turn signals!
Yes flush mounts are less conspicuiousand hence they are technically illegal for that reason. (not the correct lens size and dimensions required to be DOT approved)
Again, you are only 'enhancing' your signals, not replacing them. You are also using amber LEDS which an officer told me here that as long as the "forward pointing lights are either white or amber" you aren't doing anything wrong and is not illegal. Albeit this was in Canada, but I can't see additional amber lighting/signals being an issue at all. Heck, look at semi trucks these days! They have like 112 amber lights on them!!!
Again, it's all about "bigger fish to fry" and the individual cop. I got a ticket for my blue Pod llights from one duche cop. Since then, I've ridden past dozens of cops with them on who don't even look twice. Go figure. I now have a switch to turn them off (...what blue lights officer??)
Even if you got pulled over, I would find it hard to believe that someone would give you a ticket for additional signals that make you safer, more visible to traffic and are the correct legal colour (amber). If you had say green signals or something, then you might run into issues.
I wouldn't worry about it at all.