They are quite expensive though and there is no proof that they work.
So I came up with an idea

I want to put some cams in my car at some stage in the near future, but like I said they are expensive with no proof that they work. So I was thinking, maybe everyone who is interested in cams can put in some money towards buying them and I will have them tested on my car.
If they work well I'll refund the money to everyone who has contributed, but if they don't work I will have them removed, talk to RPW and depending on the outcome may refund partial money.
Basically if we get about 20 members putting in $50 it would be great!