Hello Diver - our (URSA's) experience with IRIS has been very good. The need for delay seems to be associated with testing with a hammer (up close and personal to confirm the gear is good to go for an event). Lynn shot the NorCal event last weekend and shot it fast - no problem getting the lights to flash. For now we are sticking with IRIS - and hoping that RTAC will stand behind their assurance that they will repair if needed. They (RTAC) are also working on a project that was already in work when the sale was made - a longer range remote. That is where we experienced "problems" - shooters think they "must" have had a hit but no light. Lynn and I have both shown that NOT to be true within minutes after the complaint was raised - hits and lights. So, possibly we'll "soon" have a remote that works with our current gear and we can promptly demo that the lights are working just fine.
Moving forward to what can be purchased...maybe.
Since I have made multiple attempts to reach the people that bought the IRIS tech, I will now give you their website - noting that it is a one page, "coming soon" (for months), and they are basically uncommunicative - even though I've advised them we will buy a unit to test (to consider for possible future purchases).
https://lightreact.com
and their FB page (last post in Sep '16) -
https://www.facebook.com/LightReact/
Whoever has a good link to the "Pi-ft wireless sensors", please post or re-post. Thanks.