Yeah, I would think that it would be easier to get the Solo, than to re-fit the boardwalk with parts and stuff like that, don't know where you would get those wood fenders from?, but I suppose it could be done if you really worked at it!
Ken, what are "big apple" tires??..Are they a brand of tyres? I would think if they are 20 inch tyres then they would be fine, I just put a kenda tire on the rear, and it's just fine.
Take care,
Benjamin