Join Date: Oct 2007
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We have used a similar base to the one you describe, though it was fastened in with the seat belt, I think the leg on the front is just there as an extra support.
There are many isofix seats etc out there that solely rely on the isofix fittings, so I think it should be ok to use, we never had any problems with ours, and yes, it is so much easier to use the base than struggle with seat belts each time. Especially this time of year.
Hope this helps
Currently in stevie32's garage:
2004 renault grand scenic 1.6vvt