I have had smaller jobs before involving some brush, i do this per basis and dont specialize in brush removal, i primarily cut lawns. I was looking at www.redmax.com they sell "reciprocators, look like blades on the end with 20 teeth. The 2 stroke z2500S 25 cc model or an Echo SRM-400U Brushcutter 40cc. Both are largest in their brand. The echo has ONLY one model the 40cc with a saw blade at the end, but it has maybe 100 teeth not 20 large teeth like the Redmax. Questions... What is the benefit of a large tooth 20tooth blade vs say 80-100tooth saw blade? Im taking down mostly 7ft tall weeds that are 3/4" to 1" around green plants, they grow very skinny and tall. Other question i had, now hard would it be to take say a Redmax BCZ3000s , a 30cc string trimmer, and add a blade attachement? at least that way i can use it as a trimmer while im not doing any brushcutting. AND..... DO I NEED THE HANDLEBAR style brushcutter or can the standard small handle work fine? Is there a big benefit of having the handlebars to angle the cutter with the neck strap? The Redmax is 15lbs so its not heavy heavy but not light like the 11.xx lb trimmers are, ill be doing this for a good 3+ hours so i dont want to not feel my arms by the end lol. Thanks for all who have experience in using these.