Don't listen to these kids... accept the guy who said check your other post because I already told you what to do and I am apparently the only one who knows.
Think about this EVERYONE, why should we center mount our T-halls and AR5s and what not if Tanner Hall and TJ Shciller don't?!!! Armada doesn't have to make us the same skis they do for their pros but unlike most ski companies THEY DO!! So take a suggestion from Tyson Hall Tanners brother who runs the factory/ and US distribution and mount them recomnended. Heres the chart I posted from the other thread, they are measurements from the tail to the midsole mark and they apply to both AR5s and Tanners as they are from the same mold.
160s= 74.5cm from tail
170s= 79.5cm from tail
176s= 83cm from tail
180's= 84.5 from tail
PS I owned 176 Tanners and 180 AR5s last year and I mounted them both recommended and they were more than I ever dreamed could be possible in a park ski and would NEVER mount them any different for anyone especially a park skier. Too far foward on that shape of ski= not enough speed for tables over 40 feet. If ALL you do is rails than drill them however I guess but if you're an all around park skier like most of us are do yourself a favor and trust Armada they made the best park skis now let's trust them on how they should be skied.