I am building a module with just the opposite arrangement- Kato turntable and Atlas track. Had to shim up the Atlas to match the Kato TT.
Original Poster made me curious, so I ran upstairs and pulled out some track pieces. It ain't happ'nin' the way that Original Poster wants to do it unless he plans to cut some very short pieces of flex track to go into the slots. If he tries even to use the smallest straight piece of Atlas sectional, the Kato will not butt up against the edge of the turntable. There will be a gap that he must fill in with cork or something. If he tries to use the Kato "transitional" piece, the smallest sectional straight piece falls short. If he goes to the next size up, the Kato roadbed will not butt up against the turntable side. The safest bet is to use a larger piece of flex or at least an Atlas regular sized straight piece from the Kato trackage to the turntable. If you try to butt up the Kato track to the turntable edge and add the tiny piece of flex in the slots, my money would be on frequent stalling from electrical gremlins as well as derailments.
i dont know what those turn tables measure at but could he not just cut the kato track to fit in that ? cut track and leave some rails sticking out...if track bed is to high he could sand down the road bed at a angle to fit. just ideas...
On my last layout I used the Kato adapter piece which worked out pretty well. I modified the Kato base and shortened the Atlas track to provide a good but up to the turntable base with minimal Atlas lead track. Sorry, no pictures to show of the end result, but it did work well.
Thank you all! You gave me the answers I am looking for. I have a Walther's turntable and am getting to the point on the layout of getting ready to install it or switch plans to the Atlas for the pre-wired convenience and indexing. [The Walthers is an older NOS one]