Folding a B Agile 4 with cosytoes on?

[anxiouslyirritated]

I posted a while ago Re carrycot probs and got some great help so am back!
Have now got the b Agile working as a pushchair (DD aged 3 monthshas tired of the carrycot.) all seems to be working well. But!in the winter will want to use a cosytoes, but still need to fold the pushchair down to get in and out the car for the school run for older DD. Does anyone know if I can access the folding strap with a cosytoes fitted, so I don't have to remove cosytoes in order to fold up the pushchair. Presumably the (expensive) Britax cosytoes would work but would be great if anyone knew of a cheaper universal one which also works.
Thank you!

I have a baby jogger city mini which I think has the same fold mechanism (pull strap on seat?), I use it with a generic footmuff and just reach under and pull, takes a second or two extra but doesn't affect in any way.

Thank you! Yes that's right they have the same fold mechanism...great!