About 4 years ago I had Serotta fitting done. Since then I have moved out of state, looking to purchase a new frame and I could use some help with the numbers.

Below is a copy of the Master Design Template tab from spreadsheet.

This is base on 6cm saddle to bar, 52.8cm nose to bar center and 7.2cm setback.

The frame dimensions that I have entered are for a Colnago C59 50s. The two numbers that I don't know are HTA and rear drop. The numbers I have entered are approximate found from searching the web.

Am I using the screadsheet correctly and is this correct frame geometry/size for me?

Thanks