No, the 1/3 which previously split is in the way of the 2/3 which he was trying to fall therefore to avoid cutting the 1/3 he would have to bore into the 2/3 and only cut the 2/3. After the 2/3 falls he could cut the remaining 1/3 as usual.
Just did it, it's really easy. Just contact a broker t take care of all of the paper work.
Here is the one we use all the time;
http://www.charleshiggerty.com/
Yes, that was the problem with the one that was on there, it got hung up on everything. This one is much higher, and the little step is hung on 2 very tight bolts, so if it catches anything it simply pivots, then I loosen it off, reposition it and tighten it up again.