Hi AL,
Last Summer I installed them on my bike for the fronts. And they work incredible, I love the intensity in their directional feature, people will know you are turning. and know you are there.
I have them connected to Motone Switches on my clipons and at the moment there wasn't a module "affordably available" so that when I hit the signal button they stayed on. So they are still monetary. But there is a Module that a smart group of people build, its called, NUUT. You can buy it at Illfated Kustoms in Calgary AB. Great guys. I think this switch/box/PFM/module may allow you to have them run how you want, there are a few options for it. When I have it installed it will allow the appropriate switch to latch and unlatch.