While I’d hope to only add to any discussion on Choice in a positive way, I’ve an important complaint with the posts on this topic.
The ongoing discussion has been suggesting the use of metal cutting blades or devices in place of using nylon chord on line trimmers. This may be extremely dangerous. There is no word or caution on the safe use of metal cutting devices or even advice that line trimmers in general are not designed for such attachments. Domestic line trimmers are supplied with chord devices because they provide a lower risk than more solid devices.
I’d accept that there is a clear concern over the potential for environmental harm from the waste plastic released from the trimmer chord wear and tear. Which if any of the chords in use are biodegradable might be a good question?
As to the use of any metal blade or similar device on a line trimmer - if it is not part of the accessories available for the trimmer you purchase who is then responsible if it causes death or injury.
I’d hope Choice can respond by adding a clarifying note to the review. Generally commercial grade brush cutters used for business or rural work may have a range of metal cutting blades that are suitable. Fitting just a standard saw blade may not be safe. Perhaps future reviews should consider brush cutters and similar typically with direct drive geared heads in a separate category?
Secondly I’d hope Choice can moderate this discussion and point out or remove the suggestions that appear to recommend the unqualified use of potentially hazardous attachments.
Professional and rural use brush cutters come with additional safety features and instruction warnings/advice concerning the fitting and use of any metal based cutting devices. They do present a hazard to both the operator and bystanders
When compared to a nylon chord hitting a solid object or small rock, a nylon chord flexes and has low momentum. A metal blade has much greater mass and can cause small rocks etc to become dangerous projectiles.
I use regularly a Stihl FS250 brush cutter in a rural workplace which does have a range of metal bladed attachments, however it would have been outside your price range for the review. There is plenty of good advice in their user manual. You did include a Honda 425U in your review which is effectively a brush cutter (light duty). What did it say in it’s user manual?
I have yet to see a council or professional contractor work in public with other than line chord for trimming.
Well intention-ed advice also needs to be well considered and well informed. I hope this helps you decide on how to respond.