Never had the he but really enjoyed my p17, sold it to a friend for his first and been trying to get it back from him. Cheap enough new just fancied...
can't remember how long the ports are, but so long as you don't go smaller than around 2.8mm it will flow OK... 3.0 is pretty much the min for a full...
The original lazaglide Les was 25mm and was available late 87 early 88. Ivan and Dave came up with the idea 1982/83 but took them until the late 80's...