Splitting the lights is doable, there's not many people with happy memories of doing it tho.
Fly eyes is easier on pre facelift as it doesn't have that nipple bit on the lights. Can't remember what model you've got atm
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East of England Rep
Midge - MG ZR 105 (10-11)
Stella - MR200 Fiesta
(11-15)
Silky - R171 SLK280 (15 - )