Tamiya makes both good cement & putty, and is widely available.if you do decide to make the body shorter, put tape where you are going to cut and make the cuts inside the taped sections. that way, if the saw or knife slips, it will hit the tape instead of good plastic underneath. any tape is better than none, but a thick tape used in embossing label makers forms an edge to rest your cutting tool against (i've used Dymo-tape brand).