Greek Gyros how to marinate and cook on a charcoal spit

With the help of Nick the spit master we show you how to marinate and prepare Greek Gyros and then how to cook it on a charcoal spit.
I used 7 kg of lamb shoulder and 7kg of chicken thigh which is enough to feed 20 people.
Nick has shared his marinate recipe, however you can adjust the quantities to your taste.
Nick the Spit Master's secret Gyros spice mix:
Mix spices together into a jar.
• 2 tbs Chicken spice
• 2 tbs Steak spice
• 2 tbs Cumin
• 1 tbs Paprika ground
• 1tbs Garlic powder
• 2 tbs Parsley dried
• 4 tbs Oregano dried
• 4 tbs Thyme dried
• 1 tbs Salt
• 1/2 tbs Black pepper
Add the spices and two tins of crushed tomatoes into a tub or in this case the meat bags, mix well and allow to marinade overnight or 24hrs, the longer the better.
It will take 1.5hrs before the meat starts to cook on the spit. You do the first cut and then every 15 mins or when the gyros has browned.
Nick the spit master uses a serrated bread knife to cut 1/4 inch deep slices .