I've purchased Bro-Tek spacers for my B2920, L2501, L4060, and MX6000. All 2", except the L2501 I went with 3" spacers. The Bro-Teks have always had the studs already preinstalled. Very simple installation, and the aluminum will never rust. Obviously a tractor like an L4060 or MX6000 has really...