Hi Timjohn, I've just become aware of the Cycle Analyst in the past day or so. It seems like there are a couple of accessories that one can replace by using the CA - for example, the usual display unit. This would make the CA more economical than at first glance. Also it seems like the longevity of some components could be increased through observation and adjustment. Am I mistaken?The Cycle Analyst display has these big pixels and seems to be right out of the 80's era. Its very visible in bright sunlight and gives the essential information on the screen. Speed, battery status, realtime watts usage, amp usage, trip distance per charge (needs reset after every charge if you want to monitor battery usage). I am very, very pleased with the feel of this bike. Plenty of power for the hills in my neighbourhood.
The Cycle Analyst is accessible through a PC (Mac or Windows) software with the appropriate interface cable so you can fiddle with various parameters of the controller. You can also change the parameters through the Cycle Analyst display but its probably more tedious with only 2 button input buttons. GRIN setup the Cycle Analyst before I picked up the parts that matched the Bafang motor that I bought. I haven't played with parameters yet but you can tell this was designed by a bunch of engineering types. I like this even though its not simple. The thinking behind this is the way that I think. GRIN staff and support is great. They answered all my concerns and questions and their web site is filled with lots of technical information, videos and definitely lots and lots of products. Highly recommend GRIN to those who want to build their own.