just a minor correction to the post by alexban...

he said, I quote:
"The Ng will present a problem though,as in case of wheel damage the gear won't retract,to prevent further damage."

that may be read out of context here...

What he meant was:
"The Ng will present a problem though, as in case of MLG wheel damage, that particular gear won't retract, to prevent further damage."

Just thought I'd make the distinction!

FD :)