"arch_instance" argument

[SerezD]

Hi there, thank you for the great job!

I noticed that your implementation has an argument called arch_instance, set to default as res_mbconv. From the provided readme, it appears that this parameter is set as default in all your runs.

My question is: is this just an old argument used for testing different architectures? When training a new model, is it correct to leave it as default?
Can you also please provide some more info on what this argument does/what are the different tried architectures?

Thank you