PDA threw down a challenge on the Armourfast site by modelling a series of mark IVs. (The last time I looked on the said site it was only German WW2 figures!) Having picked up a Matador tadpole set for a couple of quid i thought I would also have a go!
Yes you can see the join - the rivits are a different size. However, at least the MkIV tadpole did exist even though it never became operational.
I think I might have said the kit was challenging, as it most certainly is! You've done about as good a job as I think anybody could with Matador's offering; well done. I hope that Emhar do eventually bring out the 1/72 version of their tadpole, although I can appreciate it's probably not a priority for them, right now (and understandably so).
I'd love to know what colours you are using, RCD. And not just on this latest work, but also what you use for British uniform.