Racer bahi, sorry i don't have other lock experince , although when i was finding place to hang wirelock ... my cousion told there are other lock option available why not you use that ... i'll discuss with him then let you know inshaAllah.
As far as top speed is concerned, i did not find a chance to accerate it to high speed ... there is only one road i.e. lawarance road in my route which is comparativly less packed ...so far i could only touch 70 and immediately i have to apply breaks :)