Hi Imran!?
Yes, based on my research and experience it appears that the following is generally true in terms of Felder/Aigner compatibility:
-- When the Felder table extension mounting bars (TEMB) are installed with the bolts at the bottom of the bars, they are compatible with both Felder and Aigner products
-- When the Felder TEMB are installed with the bolts towards the top of the bar (machines with shallow (less than 40mm tall) aprons, reduced OD spacers will allow for most Felder table extensions, but is still too shallow for Aigner table extensions (the Aigner table extensions and some Felder parts, such as the band saw fence assembly, have a deeper "hook").?
-- The Aigner TEMB are shorter than the Felder TEMB, so the Aigner TEMB will accommodate the 1m Aigner and likely the Felder 1m table extension, but the Aigner TEMB is not tall enough to support the Felder cantilevered table extensions.?
Ultimately, while the Felder bars are triple the cost of the Aigner, they seem to have broader compatibility/versatility. Also, they are a one-time purchase for machines, and they don't wear out, so it's not as though it's an ongoing expense. I've just started incorporating them into the expected purchase price of a given non-Felder machine..... Hope this helps, I'm happy to explain in more detail if desired. ?
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Tom Gensmer
Heritage Home Renewals, LLC
Minneapolis, MN
Tom Gensmer