It should be noted that the configurations of the windows 308 could be formed in a manner other than as described to achieve the objects of the invention. [0146] As best illustrated in FIGS. 25 and 26, the outer drop tube member 108 preferably includes portions 324 which extend upwardly and inwardly from the bottom end 298 of the member 282 along an inner surface 326 of the first portion 286 such