I got some advice last week on fitting a kit to my bike, Nealh and morsmana suggested Woosh and Oxydrive.. The Woosh kit is appealing as i could get a 15ah battery for my budget (about 500 pounds). However they tell me today that it is out of stock till June sometime. So bearing in mind my weight of 100 kgs would you order the Woosh kit for June or get this Oxydrive special offer http://www.oxydrive.co.uk/offers/index.html and hope that 11ah will be enough for my usual cycle of about 30/40 miles where i would like assistance for around half of that distance.