hi all i have a 1973 34 ft allmand sportfish and would like to install riggers.the problem is i dont know what size and how to mount them or where to mount them. .also has anybody had any experiences with them mounted onto a radar arch i have seen these mounts on the web for good prices with poles.also im looking for a kinda cheat way out because they wont be used that often any ifo would be appreciated ..... 