String Trimmers

I own an 128LD trimmer that I purchased 4/4/16. Depending on where I search, the type and kind of accessories/attachments I'm supposedly able to use with my machine varies. Your website says my model can use the Brush Cutter 825/24 attachment: (967 18 59-01 see below)
while your catalog, Support site, manual and other sources say I need a different attachment (952 711 610).
I am also interested in using the:
- Blade Conversion Kit #966 56 89-01 (see below)
- Tri-Cut Trimmer Head 10mm arbor #578 44 91-01

I am very confused. Please refer to the links and the document page numbers listed below. Please clarify exactly what I can and cannot use with my trimmer