The primary of my Tesla coil consists of 8mm copper heating pipe. This is fairly easy to bend and comes in a roll, so careful handling should ensure that you do not get any kinks.
The base for the primary deck is a sheet of Acrylic 5mm thick and about 20 inches in diameter. This has a central hole cut into it that is just slightly larger than the secondary coil's diameter. The allows the secondary to drop through the hole and screw onto its mounting post.

To assemble the primary for use, you simply drop it onto the four upright posts that stick up from the MMC below. Each of these posts has little studs in their tops that locate into four corresponding holes in the primary's Acrylic sheet base.
I then just have two very quick and easy connections to make for each end of the primary coil.

The copper tubing is a push fit into the six combs, and finished off with a cable tie to stop it from popping out. The combs are held to the circular Acrylic base by plastic screws, as it is best not to use metal this close to the primary if it can be avoided. The combs were made by carefully drilling accurate holes into a strip of quarter inch thick Polycarbonate. These holes are the exact diameter of the tubing. I then cut the strip down lengthwise as can be seen below.




The strike ring around the edge of the primary is there to protect the primary from a direct hit by a streamer. If the Tesla's primary suffered a strike then it could damage the Homemade Transformer, although the use of a Safety Gap and Terry Filter will also protect things.

The strike ring works because of the fact that if a streamer came down, it would find it easier to jump to the strike ring, which is linked direct to the RF earth, rather than going to the primary. It is most important to have a 2 inch or so break in the ring. Otherwise it will look like a closed loop to the coil and it will absorb power because of eddy currents.
A better solution is to have a sheet of Acrylic covering the primary to protect it from strikes. Sometimes when the streamer hits the Acrylic shield it disperses like water over the surface - a quiet unusual sight.





The tubing is held in place by small cable ties that can just be seen in the picture below. I drilled a small hole underneath each cutaway through which the cable tie goes.





The white plastic screw heads you can see secure the combs to the Acrylic base. The inner end of the coil is secured firmly and brought through to the underside of the base for its connection.