Joining cut down 2x4's with tongue and groove/ Vaneer Glue
Im cutting down regular 2x4's to a final dimension of 1.25" x 3" to be joined end to end to create surfaces. I want to join them with tongue and grooves. My question to everyone here, which do you think is stronger? 2 - 5/16 tongue and grooves at 5/16" deep or 1 - 1/2" at 1/2" deep? I am using an older craftsman table saw that i have ever so nearly set up to make pefect cuts. The jig i made to cut the tongues and grooves is kind of not perfect. Pretty good but not perfect. This is leaving me with little gaps etc in the joint. Everything need to fit together perfectly. As one big piece. I thinking it would be a lot easier to do 1 tongue and groove but 2 tongues and grooves seems stronger. Ultimately i need to master a jig to cut multiple tongues and grooves. I dont like being defeated so i might go with 2 and 2. But i wanted to know which you guys thought was stronger?
Also,... whats the best type of glue for creating veneer structures? I made a jig that allows me to cut perfect super thin shims using the table saw with ease. Kind of like a meat slicer. No constantly having to adjust a fence etc. So i cut a ton of these shims because they are so flexible. I want to bend them into crazy shapes and them veneer other pieces to the last effectively building up to a desired shape. I need a glue thats strong but applies easily and evenly. Like with a brush or something. Regular wood glue is thick as hell and hard to coat evenly. Anything out there like what im talking about?