I worked out a solution that was better than the problem I posed. I got it to print the whole thing in one shot. I was able to resolve this in the slicer by setting the bottom thickness to 10mm and number of bottom layers to 50 and the special mode to spiralization. . The bottom portion came out as normal printing with 20% infill and after the 10mm mark it did the rest as spiralization. Thanks to all for the input. I'm pretty new to 3D so there are lots of challenges. Again, my thanks.