@c1954ritchey 

According to our knowledge base, mixing different Deco models in the same mesh network is technically supported, and your approach of upgrading just the main unit is feasible. Here are the key points to consider:

Hardware Compatibility:
• Your current Deco X68 has dual 5GHz radios (5G1: up to 1802 Mbps, 5G2: up to 1201 Mbps) plus 2.4GHz
• The Deco BE63 (BE65) adds a 6GHz radio (up to 5764 Mbps) while maintaining 5GHz and 2.4GHz bands
• Both models have 2 x 1GE Ethernet ports on the X68, while the BE63 has 4 x 2.5GE ports

Network Operation:
• The mesh system will function properly with mixed units
• The 6GHz band on the BE63 will only be utilized by 6GHz-capable client devices • your X68 satellites cannot use 6GHz for backhaul
• Backhaul between the BE63 main unit and X68 satellites will use 5GHz and 2.4GHz bands, which both models support
• There should be no increase in collisions due to mismatched units • the Deco system intelligently manages band selection and channel optimization

Regarding Your Device Disconnection Issues:
With 57 devices online and some devices kicking out every few days, upgrading to the BE63 as your main unit could help because:
• The BE63 supports more advanced usage scenarios and is designed for networks with over 60 devices
• Better processing power and newer hardware may improve overall network stability
• The additional 6GHz band can offload compatible devices, reducing congestion on 2.4GHz and 5GHz bands

Recommendation:
Your upgrade plan should work well. The BE63 will provide enhanced performance for your main unit while maintaining full compatibility with your X68 satellites. The 6GHz capability will be a future-proof addition as you acquire 6GHz-capable devices.