I am getting ready to order the Preco trimmer rack for $70.00 and I also need a BP blower rack. Does the one in the link below lock? It does not say in the description. Also, is it worth it to order the trimmer line spool holder for $30.00 or is it a waste? Probably just as easy to keep trimmer lin in your toolbox. Thanks... Edit: I am assuming my Husqvarna 145BT backpack will work on this rack correct?