i put mine on the spacer between the steering wheel i have it set on speedo because mine is out by 10k but ive never had any problems id just tell them its a information unit like a RSM, and also it flicks over (to timer mode) when you switch the keys off. the HKS ones are good i wanted one of those the TYPE 1 but there pretty enpensive so i have got the greddy fully auto timer, practicly the same but the HKS takes out the speed limiter the reason i liked it but when i get my power fc that will do it for me!!
cheers simon