Not positive, but you may need the 1/4" larger straps, due to the fittings larger outer diameter.If you a replicating my manifold then yes your list looks correct. You have 5x 1/2" unions and I only used 3 so not sure what the extra 2 are for but you are not missing anything. Don't forget to order the o-ring kit I listed a few pages back, you will need it for the reactors.
Edit: Just noticed you have 1-1/4" straps. You need 1" straps for 1" pipe.