Hello all and Happy New Year. Here is my situation. I am a single person operation and most of the time trimming is normal string trimming. I use one trimmer for normal trimming and just open up the throttle for brush cutting a handful times a year. Average time spent trimming per site is around 7 minutes while using my special trimmer mentioned here below. I have been using now for two years an older Sears 31cc 2cycle 18 inch width direct drive curved shaft as my primary machine. I have been using it because it is no longer stock. It has been heavily modified and now a low rpm torque monster. It uses 94 octane pump gas with a 32:1 mix of Klotz castor oil because of the high compression and piston side loads. It now has a 23 inch width of cut and max rpm of 6500 while at a very light stock weight. I operate it all the time at 2000 rpm and it idles at 1500. I don't need to rev it much cause of the torque. It is making so much torque it twists the drive shaft apart. The tube is not worn out and making the shaft break, just brute torque. Before I modified it, it was a great, reliable machine, but underpowered. It is still a great machine but unreliable because I don't know when it is going to break the shaft. Now here is my problem. I want a new trimmer/brushcutter with the diesel like low rpm grunt that I am use to. It must be blade compatable to do brushcutting and not be too bulky to do delicate trimming with the string head. Most commercial duty string trimmers I have looked at are 25cc 10,000+ rpm screamers with little 15-17 inch cuts and wouldn't handle brushcutting. Yes they are light weight for string trimming, but I don't want to rev a little 2 cycle to 5000 rpm or more to start making power or engage the clutch. Do the brushcutters like the Stihl FS 250 and Shindaiwa B530 have the low end torque that I like? Do the clutches start to engage at a very low rpm? Maybe 500-1000 rpm above idle? Would they be too big for normal string trimming of driveways and rain downspouts? The 13 pound weight won't be a problem since it would only be used for about 7 minutes at a time. What are my options? Cost will not be a problem if it buys quality. I am not loyal to any one brand, but am extra interested in the Shindaiwa lineup. I bought the EB8510RT blower this year and love it. It is a quality built machine and decently affordable in comparison to the competitors. Are the trimmers they offer able to withstand commercial use like my blower goes through? Most other pro cutters around here use midsized trimmers like the Stihl FS 90 and Echo SRM 310, but don't offer brushcutting services like I do. I would like one machine that does all. The way I see it is that I can get one heavy duty built brushcutter and use it for the rest of my life string trimming because it will not wear out quicker if it is used for light duty string trimming and occasional brushcutting, than get a smaller machine because it is used more for string trimming and hope it will hold together when I need to do brushcutting. The suped up Sears did everything I could throw at it from decorative trimming to 2 foot high grass brushcutting. It will become my backup trimmer. Not too bad for a trimmer that cost $99 13 years ago.