Hi folks I had thought I had posted this before ...guess not so here it is now
Here's my take on how I mounted my tortoise switch machines to the peco turnouts.
I could have changed all the standard sized tortoise point throw wire to a heavier guage as I found with the peco springs the tortoise was not reliable so I simply removed the peco spring .
I'll make it as step by step as possible.
First step was to use my drill to cut a slot wide enuff for the tortoise throw wire to travel freely without being obstructed by the benchwork wood or cork roadbed,second step I lined up the tortoise switch from under the benchwork so it would throw the peco turnoutpoints then I used a marker to trace around the tortoise switch to mark its mounting location,I then moved the tortoise out of the way , I put one side of velcro on the underside of the plywood ( 2 strips wide) applied the opposite
adjoining velcro to the tortoise switch ( 2 strips ) , mounted the toroise to the velcro , chked that the turnout would throw ok if it didn't I fine tuned by just giving a slight twist and gave the tortoise a good push upward so it was good and secure once I was happy with the point action , I used #4 x 1/2" screws (the ones that need the #zero screw driver) I
screwed in the first screw about 3/4 the way in on the wire end corner then I went to opposite corner 3/4 screw in then the other 2 corners I seated the 4 screws evenly then double chked the throwing action of the points.If you find for some reason that it went on crooked or just bad you can turn the tortiose around coming from the opposite direction.The velcro was a bit of an added cost but this worked like a charm for me. I found the points wouldn't throw with the springs in so rather than
stretching the spring to weaken the action I took the springs out and they worked great except for they large Y turnout at the reverse loop intersection which no matter what I did didn't seem to allow the points to hug tightly against the adjoining rail so I put that spring back in but I colapsed the spring a bit so the tortoise could throw it with the size of wire that came with it.
Once all the tortoise switches were secure I snipped off the excess throw wire.
If I find I'm not happy down the road with the springs out I will reinstall all the springs but collapsed a bit so there not so strong.
If you want more info on mounting these try this link out.
http://www.sheridanonline.me.uk/
Just thought I would add a few more step by step pics for mounting the tortoise switches
I used 3/4" wide strips of velcro ( sticky back )

stick 2 strips to top of tortoise
set the tortoise throw wire to centre

line up the tortoise from underneath with throw wire poking through points hole making sure while holding it up in position that the peco points will indeed touch the rails when thrown and mark with pen around the tortiose where the velcro will have to be stuck on

the pen indicates the hole in benchwork

stick on 2 strips of velcro inside pen outline

mount the tortoise onto the velcro and test the points to make sure they touch each rail when there thrown
use #4 x 1/2" wood crews ( the tiny ones that use #0 robertson screw driver)

start inserting screws while pushing up on the tortoise
when all the screws are in test the point action again and adjust the the stength of the throw wire with the little green doohicky by sliding it downward
