I got mine and while excellent materials and craftsmanship, they wouldn't fit my cab and E120 either though not because of the clips per se but rather because the mounting holes had been predrilled based on different dimensions. A friend has them now to ask his friend with an automotive-oriented machine shop to trim the clips per my instructions to get them to fit.
“[P]ersonally I disagree with the general philosophy of ‘genre equals gear’ at anything beyond a cosmetic level. I think the right idea is to find the right amp for you, and then play whatever kind of music you like. The “Jerry Thing” was just Jerry. It wouldn’t have mattered what he used and he used a lot of stuff.” Steve Kimock (The Gear Page 04/08/18)