Okay here it is. I took the plunge and installed an auto drip system.
Hardware;
1st the install of a T, then a needle valve.
Drilled and ran the water line under the sink. After I plumbed and tested the system I tacked the water line under the bar so no one can see it.
Drain and pulled the sump to the side. I drilled the sump and the wall for the water overflow. Tapped threads into the sump.
Even though I used Teflon tape on the threads of the compression fitting I used a little silicon just in case. After I installed the line I filled the sump to test for leaks.
Here is the overflow in action. System running...
The other end...
I simply drilled a whole in my DYI sump top for the drip. I secured it with a zip tie on the other end for now so my cats don't pull it out...
I'm also going to use the line for small water changes in my 30 gallon that sits under the 140 on the other side. There is full pressure running to the line so a 5-10 gallon water change will go pretty quick.
I'll still conduct gravel vacs every once in a while just to suck up debris in the nooks and crannies. Both tanks are pretty much fully planted making normal gravel vacs impossible.
I mathematically figured out the GPH drip to about 70 gallons per week for a 140 gallon tank. I normally only change 15-20% per week. Normal water changes are usually small to reduce shock. I figure that there's really no need to worry about this shock since this is a gradual and continuous flow. So, I could technically cycle out 50% of the water per week. I would like to increase this but do not want to harm the fish or plants. This is just guesstimating so any input would be appreciated.