and so the tabs can be bent by hand or easily with a pair of pliers the result is an attachment that is securely fastened the embodiment of fig3 follows closely that of fig1 save that the tabs are disposed upon extensions of fin 11 at the top and bottom thereof rather than near the middle with spoke 7 being the rear spoke upper tab 14 is bent away from the reader and the lower tab 15 oppositely should the spokes cross in the opposite manner both tabs are then bent in the opposite directions the top plan view of the embodiment of fig3 is essentially the same as that for fig1 i e fig2 so this figure has not been repeated the embodiment of fig4 has a fin 17 which is similar to prior fins by having tab 20 formed around one spoke but different in that a lower tab 18 is relatively vertically disposed and is longer in the fold over portion it is shown in the non folded configuration the fold is made at dotted line 19 upwardly so as to bear against the junction of the two illustrative spokes 7 and 8 and to embrace them on both sides the objective is the same as previously to derive stability for the attachment by engaging the cross over of the spokes upper tab 20 is also longer than before it preferably embraces the forward one of the pair of spokes the body assembly 12 is similar.