To The Pro's Converting Spin Cast To DIY PVC Gravity Tubes.

I just converted mine over with 4" PVC materials. Only problem I am having is the funnel in my feeder comes down to a 1.5" or 2" hole so I had a bit of clogging there. Also my trough may be too short. It literally was pouring feed... How long should I run PVC from the Tee for the trough?

Otherwise, liking the set up!