Alan that looks real big and beefy.
Can you go through explaining some of the thinking.
Here are my questions some are just seeking clarification so i am sure i understand your build.
Why the high rear fence?
Glen inspired me to incorporate this feature into mine. I've done some trim on the router table that's required a tall fence for support and for feather boards but never always used them due to the fact that it wasn't readily easy to use these items.
Does the large dust collector suction not end up sucking the object being routed into the table too much like a vacuum hold down?
I have a 4" connect for under the table and a 4" connection on the fence. The suction is enough it will hold the piece there but not so hard that you can't easily move the piece thru the bit.
Is it me or do the sliding i presume sacrificial fences at the table level on either side of the opening stand proud of the top fence ? If so why?
They are in the same plane.
Then am I correct in understanding that positioning of the fence happens by unlocking the second table saw fence you using on the same rail and sliding that forward. So you get to use the scale on the table saw rails for front to back positioning of the fence to the bit or what would be the depth of cut?
Yes by moving the second table saw fence I can move the bit closer or further away and also use my wixey digital fence gauge.
What bit did you rout the slots for your fences with, a T slot cutter or two separate bits?
I used a 1/4" router bit for the first pass and then changed to a t-slot bit to finish the slot
Then not related to the router table which castors are you using on your base, they look a nice size and thickness can you tell us where you got em?
They are 3" swivel locking casters I got at woodcraft about 4 years ago. I think they support about 300 lbs each and were on sale for about $11 each.
Also think you could show me a pic of you dust collector pipes all merging above the table saw where the router fence pipe connects?
Thanks for sharing the build. Reminds us we dont always need the purchased stuff. I particularly like your wing nuts. Have a friend with a welder think i will ask him to make me some. Not because of saving money but because i think like Jim said the comercial ones suck.