Don't tighten the guys too much as it will make lowering it to attach the top hat difficult. Now the mast sections can be lowered and the top hat assembly attached and the mast sections raised. Attach a 6 inch piece of ground braid between the top section and the next section using stainless steel hose clamps to ensure a good electrical connection. Repeat this with the next section as it is raised. Finally, the guys can be adjusted so the antenna is vertical.
Turnbuckles facilitate later adjustment due to guy stretching, etc.
I have 32, ranging in length from 40 feet to 150 feet as dictated by my property, with 8 terminated by 5 foot ground rods. The first 4 ground rods made a big difference in the ground resistance but the last 4 only improved it a few percent. I also have two 10 foot ground rods at the antenna base. Menards has heavily plated copper ground rods at a low price. Don't bother with the ones with just a flash coat of copper, they will be rusty and ineffective in a short time.