G'day jason
beautiful lacey you've got there. I have a couple of normal (Sydney forms)
Just a word of warning, don't ever feed your lace monitors by hand. As far as I know you,ve used forceps and this is ok. I had some Storr's monitors and fed them by hand and if I didn't have food a big male would come to me and sometimes bite my finger, you don't want a large lacey biting you.
and btw, they grow to about 7 feet long and 5 x 4 m is a decent sized enclosure.
Good luck
Steve