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Custard
thanks :)
The torch is CK No9, welder is RTECH digital 160 amp
The seat clamp on the second frame is there because i didn't leave much seat tube above the seat stay weld. As a result the slot for the seatpost was a bit on the short side, and doesn't exert enough force on the post, so i had issues with slipping seatpost. To stop it i made another collar that fits around the seatpost and prevents it from slipping down.