After a quick google, it seems that seam welding the turret and the addition of triangulars is the done thing, if I understand right it means making up triangular pieces out of metal and weld them to the turret tops and perhaps integrate them into a rollcage or something?
Hence Alex comment about getting your welder out?
Ah yes, easy fix Darren.
Rip all the OEM stuff out and replace with decent audio gear
With your current track record installing S/C kits, I fully expect a fully documented ICE upgrade to be completed within 3 hours
My own experience is that I have run RE040, Falken452 and Nankang SV-2 in the winter since my Zed ownership and personally have found driving with the winters was best.
Of course I agree with "Driving to conditions" approach and yes you be a utter mong to believe you can slap winters on and expect summer tyre performance in summer conditions in the winter.
RE040 were the worst in the winter btw