Rheem Hybrid Water Heater Installation Review

Stuff I used:
1 Rheem Performance Platinum 50 gal Heat Pump Water Heater. ($1,600).
1 2 gal. Thermal Expansion Tank
1 24" Aluminum Water Heater Drain Pan
1 EASTMAN 100-Gallon Universal 24"wx24"dx18"t-in Steel Water Heater Stand.
1 Mounting Bracket for Water Heater Expansion Tank
6 Sharkbite 3/4 in. Push-to-Connect Brass 90-Degree Elbow Fitting. Tranistions copper to PEX "A"
5 Sharkbite 3/4" Push to connect brass coupling fitting
1 3/4 in. Push-to-Connect Brass Ball Valve
1 Sharkbite deburring and depth tool
1 Water heater bonding kit to connect cold with hot copper pipes
1 3/4 in. PEX-A Expansion Sleeve/Ring (25-Pack)
1 AutoCut 3/4 in. Copper Pipe Tubing Cutter
1 Solder Plumbers Cloth Abrasive Grit Roll
5 3/4 in. Brass PEX-A Barb x 3/4 in. MNPT Male Adapter. To go from ball valve to PEX-A and from water heater inlet/outlet to PEX-A.
1 3/4 - 1-3/4 in. Stainless Steel Hose Clamp
10ft 3/4 in. I.D. x 1 in. O.D. x 50 ft. Clear Vinyl Tubing with Dispenser Box. For condensate line.
1 3/4 in. Barb x 3/4 in. MIP 90-Degree Nylon Elbow Adapter Fitting. For condensate tube connection.
1 20 in. x 25 in. x 1 in. Fiberglass Air Filter FPR 1
1 PEX-A Expansion Tool Kit with 1/2 in., 3/4 in. and 1 in. Expander Heads. Make sure to manually rotate head while expanding pipe.
1 Husky 1-1/4 in. Ratcheting PVC Cutter
20ft White PEX-A
1 3/4 in. PEX-A Poly Expansion 90-Degree Elbow Fitting (5-Pack)
1 3/4 in. PEX-A Poly Expansion Tee Fitting (5-Pack). To connect to expansion tank.
1 3/4 in. PEX-A x 3/4 in. MNPT Plastic Expansion Adapter (5-Pack).
4 3/4 in. Brass PEX-A Barb x 3/4 in. FNPT Female Adapter. To connect to pre-installed nipples on water heater
2 3/4 in. x 6 ft. Foam Self-Seal Pipe Insulation