There were some designs, before the decision to remove the requirement for catobar was made, with both ramp and catobar and I have tested the euro fighter mod and it is capable of taking off from the ramp on your mod just as it is irl however they never added the strengthening required for cato but it was always capable of ski and arrested. I have also drew up some what if designs and I'd be happy to share them with you if you'd take an interest in somehow getting catobar or at the very least arrester gear working however I realise with the way DCS handles modding tools it would be a near impossible task