Price point has the Blackspire Dewlie 5arm 94mm guide on sale for only $50. I have 4bolt 104mm spacing on my cranks. Could I use this guide without the included chainrings and bashguard? The 4bolt 104mm guide is $110. My rings are brand new, does this system require the included rings and outerplate (bash), or could save a lot of money and just use the guide portion itself with my own setup? Please help....