Have checkbox in addition to "Select All" redundant?

Is having an additional checkbox to select all redundent and add unneeded complexity? The user frequently (maybe 40% of the time) selects numbers 1-33 as option so I would like to add a checkbox that selects those numbers. However it is not hard to select all then uncheck L and 34-62. So I don't know if I'm wasting time here making it worse. The user would be educated on what the new T box does so that is not a problem.