We see many boxes with mesh to aid the landing and climbing of bats into the boxes and some with groves, I favour groves BUT they are far more difficult to produce, I had a small table saw which was adjusted to cut a small grove using a jig, this was great for small boxes up to 2 foot, however being gready I am now trying a Proxxon router http://www.axminster.co.uk/product.asp?pf_id=580210&filter_cat=&manufacturer_id=Proxxon&name=&user_search=&sfile=1&jump=48 with small (2mm) bits. I am also looking at a hand held (small) rotory saw http://www2.westfalia.net/shops/tools/power_tools_and_accessories/wood_saws/circular_saw/527446-circular_saw.htm which are available in the US, rare in the UK. So with all of this expense should I really just spend my hard earned cash on plastic mesh and stainless steel staples. Have there been cases of bats getting caught in the mesh? Does the mesh last? I want 10 years (hopeful) life from my boxes. So how are your results or do both systems work to perfection. Other methods of grooving also gratefully received. 
Happy New Batting Year
Dasycneme
