Compensating Fundraising Advisors Without Expanding Venture Partner Pool

We’re launching a VC fund in Central Europe and have a few advisors/connectors helping with fundraising. Some expect compensation, but we’d prefer not to bring them in as venture partners to keep that group small.
We’re considering a success-based fee (e.g. % of capital raised), but have a few questions:
  1. Is a finder’s fee (% of capital raised) common in VC fundraising?
  2. What are typical terms for this in Europe?
  3. Should this come from fund expenses, the management company, or handled otherwise?
Any advice, especially from a European perspective, would be much appreciated.