I'm using a 8' boom sprayer on some properties and am using a homemade canvas skirt with weights sewn on the bottom. I've made this with aluminum in a semi-circle that protects plantings. The only problem is slowing down and putting down more product than required. Any suggestions or better application practices out there. I have sprayed the perimeter with the backback and that works OK, but some of these lawns have long perimeters with plantings. Boom sprayer does a great even job on huge open spaces much better than backback. Ideas?????