Selden Boom End Deck Protector

Hi MikeWell I have to admire you for asking this as what are the chances of either someone trying this or having a 20+ year old boom to try it on!I do remember Holt supplying Spars but I am afraid I can't remember what shapes were what names or spec. sorryWhat I can say though is this boom protector simply slides into the track underneath the boom and is probably worth a try as I'm sure I've seen Holt and Selden sliding boom eyes used or each others booms.If it helpsThe bit that slides in the track is 20mm wide and there is a 3mm gap between the bit that fits inside and the outer partI hope that's okayRegardsDavid