*checking this thread again*

It is not obvious that "star-shaped" indicates 6-sided...the 8-points can also be viewed as a 'star'...as in 'more than 4 rays'. The pegs are square, so "star-shaped" means NOT square. The point of 8 is that it fits on more easily, and at any position, whereas 6 'may' work, but will have places that are not lined up. 8 is simply 2 square sockets symmetrically overlapped.

As to L vs. T handles....a matter of choice obviously, and sure, L does give more leverage, but I have often (like, for the 1st 20 years I played) found it was too much, and caused me to overdo really fine adjustments. When I got a top quality T handle, the good fit on the peg and the way I could simply reverse direction using only the hand/wrist motion made a believer of me. An L-handle **tends** to use the entire arm, and thus more force than needed.
   So...obviously, either will work, as even I managed to get in tune a few times in those 20 years.. ☺ Maybe it's just what you get used to.