Defo a typo, its been a few sleeps I'll have to check but given the centre measurement I'm guessing its the 2830
Thanks for pointing that out!
This drawing is very useful, but are you sure the dimensions are correct ?
D2 - A1 should be eqaul with D1 - A2, but your measurements are different : 2830 vs. 2380.
Type mismatch ?