I thought you had a puny battery. Now it's 100kWh? Why do you want to cook your pack with fast charging regularly? A DIYer is not likely to have the engineering and manufacturing tools/budget to design a >100kW charging rate.
It's plenty fast. Go to sleep, car's fully charged in the morning. The silliness of ICE people wanting 500 miles of range and a fill in 20 minutes when the car's parked at home for 10 hours, at least. Last I heard, iirc, you were around a 50kWh pack. That's a 7 hour fill at 7kW which is the Bolt charger at 240V. Perfectly adequate. I got by in the first two years on a 120V EVSE on a 12guage extension cord. Only reason I'm at 240V Level 2 is the EVSE was free in an engineering pilot study with my utility.
Hang a Model 3 charger on the garage wall and DCFC at home if you have to drive 200 miles home for lunch and then get back to work.
Overspec costs money and creates complications. By the time you're done, the landscape for CCS DIY will change, so... 🍿