I can only give the experience of local owner of this antenna.
The weak point is the insulator which support the  elements so the Dx 
Engineering can be a good fix but isn't tested on my area ( the friend have 
rebuilt by itself a support using a L shaped steel no rust alloy and with 
machined insulator made by Delrin plastic material.
The C shaper bridge which dictated the tuning of each linear loading must be 
fixed better with a rivet.
The only other fix is the end closing plastic which don't resdist to the time 
so is better to change with better plastic. 73 Carlo
 
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