Hi Goughary,
Nice to hear about the double SME, glad it worked out.
I would not want to cut an L70, I reserve that for the much more common 75. The AT could have been made for it, that was a lucky day for me!
http://www.freewebs.com/bornin50-3/index.htm
If you check out the L70 + AT1005 page, that's the first pic of my combo. The L70 is a favourite of mine, and that one is my control deck to see if my experiments on the other Lencos have any worth.
The AT1005 was popular in the early 70s, and usually paired up with motor units from Garrard etc.. A version was fitted as standard to the Leak 2001, but good luck finding one of those.
You are looking for an arm with effective length around 240mm, that puts the spindle to pivot at about 225mm. Most arms of that length are the studio units from yesteryear, EMT etc.
With a bit of filing the Regas or ADC variants can fit and are more readily available, although the problem of correct vta will always be a problem with Regas if the corner stays.
Regards