The plastic spring mechanism in your 61" dinette roller shade can wear out, causing tension loss. Unfortunately, there is no retrofit repair part currently available; the entire spring assembly must be replaced to restore function. However, since you have multiple shades, purchasing parts in bulk can help reduce costs. Orders of more than five identical spring assemblies qualify for a 5% discount on the total, which can ease the expense when replacing multiple units. While Elkhart RV Parts does not manufacture these components, they relay to manufacturers to consider improved repair options. For immediate needs, ordering the complete replacement spring assembly is required. If you want to explore replacement components or design custom shades, Elkhart RV Parts offers a shade designer tool and a variety of roller shade parts on their website.