@ocelot60- Though you may be experienced with assembling items that need put together when you get them home, I would not recommend assembling your new inversion chair without professional help. These chairs can be difficult to put together, and safety is a key factor. All of the parts need to be in place so that the occupant can safely operate the inversion chair without slipping and falling.
Once you find the inversion chair that you want to purchase, check with the sales representative for set up and assembly services and prices. Often, stores provide these services at affordable prices or even at no cost to the customers.