The K5 is larger and meant for bigger pieces of wood and it also has a built in clamp and dust cover. The K4 is moreso for DIYers and smaller. Both are great.
Yes, it comes out and you could clamp the drill guide to your work piece.
The order was easy and the pick up was too
I no longer remember what sizes came with it (I bought mine 2-3 years ago) … but I bought a second large screw pack at the same time, and it has sizes for everything.
No ! Just place on a flat surface!
I don't believe there is a screw which would work in thin ply wood. This tool did come with an additional "jig" which I was able to clamp to 3/4 inch and it worked just fine
No rebate but I purchased mine on sale.
You need to use the step bit that comes with the kit I believe it is 3/8.
For this to properly work, you need to use the Kreg specific drill bit because it has a special tip design.