I found my full length MK2 TX yesterday and that has the round latch not the grooved one.
Not sure if this is relevant but I have a MK3 HC Ser No. 66875 that has the round latch.
Cheers, Phil
My tx200s are all round like micks. Atb mick
Mk2s look better in my eyes, but some people might think differently. Atb mick
The MK1 and MK2 look a bit like they're design was influenced by the old school tuning houses.
I dropped my MK2 as shown when I tripped over a Hedgehog one night which marked the stock so I bought a near enough brand new fish scale stock off Flyingfish as a replacement.
The trouble now is that I've used the gun that much since then that the lacquer damage has worn back to how it was before I fell over and I can't be bothered to fit the newer stock.
All the best Mick